Blue light has a usual wavelength of $5.0 \times 10^{-7}\,\text{m}$ and a frequency of $0.60 \times 10^{15}\,\text{Hz}$. Which row shows a usual wavelength and frequency for red light?
- Awavelength $2.4 \times 10^{-7}\,\text{m}$, frequency $0.40 \times 10^{15}\,\text{Hz}$
- Bwavelength $2.4 \times 10^{-7}\,\text{m}$, frequency $1.3 \times 10^{15}\,\text{Hz}$
- Cwavelength $6.9 \times 10^{-7}\,\text{m}$, frequency $0.40 \times 10^{15}\,\text{Hz}$
- Dwavelength $6.9 \times 10^{-7}\,\text{m}$, frequency $1.3 \times 10^{15}\,\text{Hz}$