Physics 0625 · IGCSE · Stars and the Universe

Stars and the Universe — practice question

Star X has a greater diameter than star Y, yet both stars emit radiation at the same power. Which statement is correct?

  • AThe surface temperature of X is less than the surface temperature of Y.
  • BThe surface temperatures of X and Y are the same.
  • CThe surface temperature of X is greater than the surface temperature of Y.
  • DThe surface areas of X and Y are the same.

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