Physics 0625 · IGCSE
Light
100 practice questions on Light, with worked solutions and instant marking.
Which diagram shows correctly a ray of light reflected from a plane mirror?
Feb/March 2016
A ray of white light is incident on a glass prism. Which ray diagram shows the path of the ray as it travels through the prism and leaves from the other side?
Feb/March 2016
Which diagram shows correctly a ray of light that has been reflected by a plane mirror?
Feb/March 2016
Which diagram illustrates how a converging lens is used as a magnifying glass?
Feb/March 2016
State what this line is called.
Feb/March 2016
Explain what total internal reflection means.
Feb/March 2016
A ray of light strikes the surface of a glass block. Which row states how the ray’s speed and direction alter as it enters the glass?
Feb/March 2017
A boy notices a fish in a lake. Which labelled path does the light travelling from the fish to the boy’s eye follow?
Feb/March 2017
The points marked F are the principal foci of a lens. A beam of parallel light falls on the lens. Which diagram shows the route followed by the light after it has passed through the lens?
Feb/March 2017
Light travels through an optical fibre. What occurs to the light inside the fibre?
Feb/March 2017
The points marked F are the main foci of a lens. A beam of parallel light falls on the lens. Which diagram shows the route taken by the light after it emerges from the lens?
Feb/March 2017
Fig. 10.1 displays two mirrors set at right angles to one another. A ray of light falls on mirror A, and it is then reflected towards mirror B.
Feb/March 2017
Fig. 7.1 displays an object together with the image produced by a converging lens. A single ray from the object tip to the image tip is indicated. Fig. 7.1 is drawn full size.
Feb/March 2017
An object is positioned in front of a plane mirror, as illustrated. A student looks at the object's image in the mirror from point P. At what location does she see the image?
Feb/March 2018
Light travels through a prism as illustrated. The ray is deflected and a spectrum of colours is formed. Which term is used to describe the formation of the spectrum of colours?
Feb/March 2018
An object is positioned in front of a plane mirror, as shown. A student observes the object’s image in the mirror from point P. At what position does she observe the image?
Feb/March 2018
In diamond, light travels at $1.24 \times 10^8\,\text{m s}^{-1}$. State the refractive index of diamond.
Feb/March 2018
Which statement gives the description of monochromatic light?
Feb/March 2018
State which radiation occupies each of the regions labelled A, B, C and D in Fig. 6.1.
Feb/March 2018
Calculate the speed of the light wave in water.
Feb/March 2018
A ray of light is reflected from a plane mirror. Which row gives the angle of incidence and the angle of reflection?
Feb/March 2019
Which diagram shows the rays of light travelling through a converging lens in a camera correctly?
Feb/March 2019
A thin ray of light is moving through a transparent liquid. It reaches the surface as illustrated, with an angle of incidence of $40^{\circ}$. The refractive index of the liquid is $1.5$. What is the angle of refraction when the light passes into the air?
Feb/March 2019
Which diagram shows correctly the paths of light rays passing through a converging lens in a camera?
Feb/March 2019
Fig. 8.1 presents parallel wavefronts from a light wave in ice. These wavefronts strike a boundary with air. The speed of the light wave in air is $3.0 \times 10^{8}$ m/s. The refractive index of the ice is 1.3.
Feb/March 2019
Which diagram illustrates how light from a candle is reflected by a mirror, and indicates the position of the image that is formed?
Feb/March 2020
The diagram shows an image produced by a converging lens. Which statement correctly describes the image that is formed?
Feb/March 2020
Which diagram illustrates the reflection of light from a candle by a mirror and indicates the location of the image that is produced?
Feb/March 2020
A converging lens may serve as a magnifying glass. What is the nature of the image?
Feb/March 2020
The wavelength of blue light changes from $4.7 \\times 10^{-7}\\,\\text{m}$ to $3.5 \\times 10^{-7}\\,\\text{m}$ when it moves from air into water. What is the speed of this light in water?
Feb/March 2020
On Fig. 9.1, draw the normal at the point where ray X meets the mirror.
Feb/March 2020
On Fig. 7.1, draw two rays to find the position of the object. Draw the object and label it O.
Feb/March 2020
What makes light change direction as it moves from air into glass?
Feb/March 2021
A torch beam falls onto a plane mirror. The angle of incidence is $38^{\circ}$. What is the angle of reflection?
Feb/March 2021
A thin converging lens is used to form a sharp image of a candle. Different sharp images are seen on the screen when the lens and the screen are moved backwards and forwards. Which statement must always be correct?
Feb/March 2021
What makes light change direction as it passes from air into glass?
Feb/March 2021
A torch beam is directed at a plane mirror. The angle of incidence is $38^{\circ}$. What is the angle of reflection?
Feb/March 2021
Two rays, each with an angle of incidence of $60^{\circ}$, enter dilute and concentrated sugar-water solutions. The refracted paths are shown. Which row is correct?
Feb/March 2021
A thin converging lens is used to form a sharp image of a candle. Sharp images are obtained on the screen by moving the lens and the screen backwards and forwards. Which statement is always true?
Feb/March 2021
Fig. 6.1 traces the route of a red-light ray through a glass block in air. For the red light passing from glass into air, the critical angle is 43^{\circ}. The labels on Fig. 6.1 are: air; glass block; ray of red light; points A, B, C; a dashed normal line at A; an angle of 62^{\circ} at B; angle P.
Feb/March 2021
On Fig. 6.1, Draw two rays from point O on the object to locate the image position. Label the image IJ. Measure the image length.
Feb/March 2021
The diagram illustrates a ray of light reflected by a plane mirror. Which row correctly identifies the angles of incidence and reflection?
Feb/March 2023
Which diagram illustrates the effect when a beam of white light passes through a prism?
Feb/March 2023
A boundary separates transparent plastic from air. Light passes into the air only when the angle labelled $\theta$ in the diagram is larger than $36^{\circ}$. What is the refractive index of the plastic?
Feb/March 2023
A thin converging lens has focal length $f$. An object O is positioned to the left of the lens, as shown. Where is the image produced, and how does its size compare with that of the object?
Feb/March 2023
Which diagram illustrates what occurs when a ray of white light travels through a prism?
Feb/March 2023
State three properties of the image of the book formed by the plane mirror.
Feb/March 2023
Fig. 5.1 displays a semicircular transparent plastic block. Fig. 5.2 gives a full-size drawing of a lens together with an object O. The point labelled F marks the location of a principal focus of the lens. Fig. 5.3 presents a simplified eye diagram showing rays from a distant object and the route taken by the rays inside the eye of a person with short sight. The diagram labels "lens" and "retina". Fig. 5.4 shows an uncorrected eye.
Feb/March 2023
The diagram illustrates a ray of light moving from air into a glass block and bending so that it is nearer to the normal. What is this process called, and why does it occur?
Feb/March 2024
Which of the following statements about total internal reflection is correct?
Feb/March 2024
A beam of green light travels through a glass prism, as illustrated. Which colours of light are refracted as shown in the table?
Feb/March 2024
Which row gives some characteristics of an image produced by a plane mirror?
Feb/March 2024
An object is positioned in front of a plane mirror. The ray diagram illustrates how one light ray from the object is reflected by the mirror. At what location does the mirror produce the image of the object?
Feb/March 2024
When light passes from air into glass, it is refracted, as shown. Which expression has the same value as the refractive index of glass?
Feb/March 2024
Light moving at a speed of $3.0 \times 10^8\,\text{m s}^{-1}$ is incident on the surface of a glass block and is refracted as it enters the block. The diagram shows a ray of this light before it enters the block and after it has entered the block. What is the speed of light in the glass?
Feb/March 2024
Which table row concerning converging lenses and diverging lenses is correct?
Feb/March 2024
Fig. 7.1 shows an object situated near a thin converging lens. The grid scale is indicated.
Feb/March 2024
Fig. 6.1 presents a diagram drawn to full scale.
Feb/March 2024
As shown, a ray of light strikes the surface of a plane mirror. In which position is the reflected ray?
Feb/March 2025
The diagram illustrates a ray of light moving from glass into air. The dotted line marked ‘normal’ is drawn at right angles to the glass surface. What is the angle of refraction?
Feb/March 2025
The diagram illustrates how a converging lens produces an image of an object. Which statement correctly describes the image formed by the lens?
Feb/March 2025
Which row gives the description of the image seen in a plane mirror?
Feb/March 2025
Which statement concerning the image formed by a plane mirror is false?
Feb/March 2025
A light ray falls on the interface between air and water. Under what conditions will the ray of light undergo total internal reflection?
Feb/March 2025
A converging lens is employed to form an image on a screen. What type of image appears on the screen?
Feb/March 2025
Fig. 6.1 illustrates an object O that is $5.0\,\text{cm}$ from the centre of a thin converging lens L. Lens L has a focal length of $3.0\,\text{cm}$. Fig. 6.1 is drawn to full scale.
Feb/March 2025
The ray diagram illustrates the image of an object produced by a converging lens. What is the lens’s focal length?
May/June 2016
The diagram illustrates the dispersion of white light by a prism. Which row could be right for the colours observed at X, at Y and at Z?
May/June 2016
The diagram depicts a ray of light travelling through air and striking a glass block. Part of the light is refracted, and part is reflected. Two angles $p$ and $q$ are labelled on the diagram. Which row states the angle of incidence and indicates whether the ray undergoes total internal reflection?
May/June 2016
The diagram shows an object placed in front of a plane mirror. At which labelled position is the image of the object produced?
May/June 2016
White light is incident on a glass prism. The light emerging from the opposite side is split into colours. Which row correctly describes what happens?
May/June 2016
The diagram illustrates light moving from air into glass. The angles $v$, $w$, $x$ and $y$ are marked. Which equation is used to find the refractive index $n$ of the glass?
May/June 2016
The diagram illustrates a converging lens producing an image from an object. Which statement about the image is correct?
May/June 2016
The diagram illustrates light travelling from air into glass. The glass has a refractive index of $1.5$. What is the angle of refraction in the glass?
May/June 2016
The diagram illustrates a converging lens producing an image of an object. Which statement about the image is correct?
May/June 2016
The diagram depicts an object placed in front of a plane mirror. The mirror produces an image of the object. At which labelled point is the image formed, and what type of image is formed?
May/June 2016
A beam of light enters a glass block with an angle of incidence of $46^\circ$. It is refracted at an angle of refraction of $26^\circ$. What is the refractive index of the glass?
May/June 2016
The diagram illustrates a converging lens producing an image of an object. Which statement about the image is correct?
May/June 2016
A student sends a beam of light at a plane mirror, as shown in Fig. 8.1.
May/June 2016
Fig. 7.1 depicts a light ray striking a rectangular glass block at point X. The ray is refracted at X. In the diagram, W is the incident ray, the region above the block is air, the material inside is glass, and P, Q, R and S mark the corners.
May/June 2016
Fig. 7.1 illustrates a ray of light falling on a rectangular glass block at point X, where the ray is refracted.
May/June 2016
A ray of light travels along a length of curved optical fibre. Draw a diagram to show the fibre and the route taken by the light ray.
May/June 2016
Fig. 6.1 presents a protractor laid over the track of a light ray. The light is moving through glass towards the air boundary. The labels indicate glass, air, and the incident ray.
May/June 2016
This block is constructed from a specific type of glass.
May/June 2016
What makes light change direction when it moves from air into glass?
May/June 2017
Light enters a glass block. Which angle is the angle of refraction?
May/June 2017
Which diagram illustrates what occurs when a ray of white light passes through a prism?
May/June 2017
What makes light change direction as it passes from air into glass?
May/June 2017
Which diagram illustrates how a converging lens produces a real image of object O?
May/June 2017
Which diagram illustrates the effect when a ray of white light passes through a prism?
May/June 2017
A converging lens serves as a magnifying glass for examining an object. Which statement is correct?
May/June 2017
Which diagram illustrates what occurs when a ray of white light passes through a prism?
May/June 2017
Light moves through a vacuum and then passes into a glass block. In the glass block, the speed of the light is $2.0 \times 10^{8}\,\text{m s}^{-1}$. Which statement about the speed of light is correct?
May/June 2017
The unfinished ray diagram shows two light rays travelling from a single point on an object through a thin converging lens. What kind of image is produced, and on which side of the lens does it appear?
May/June 2017
Which diagram illustrates what occurs when a ray of white light passes through a prism?
May/June 2017
Light moves through a vacuum and then goes into a glass block. The speed of the light in the glass block is $2.0 \\times 10^8\\,\\text{m s}^{-1}$. Which statement about the speed of light is correct?
May/June 2017
A converging lens is used to produce an image on a screen. What kind of image is produced on the screen?
May/June 2017
Which diagram illustrates what occurs when a ray of white light travels through a prism?
May/June 2017
Light travels through a vacuum and then passes into a glass block. In the glass block, the speed of the light is $2.0 \times 10^8\,\text{m s}^{-1}$. Which statement about the speed of light is correct?
May/June 2017
Fig. 6.1 presents a plan view of two cars nearing a road junction. A plane mirror is used so the drivers can observe the other vehicles. The diagram identifies plane mirror, ray of light from car 1, road, driver 1, car 1, driver 2, car 2, and tall building.
May/June 2017