A photon of blue light and a photon of red light are traveling in vacuum. The photon of blue light
A) has a longer wavelength than a photon of red light and travels with the same speed.
B) has a longer wavelength than a photon of red light and travels with a greater speed.
C) has a smaller wavelength than a photon of red light and travels with the same speed.
D) has a smaller wavelength than a photon of red light and travels with a greater speed.

Question

Quizplus · Accepted Answer

In a vacuum, all photons, regardless of their wavelength, travel at the same speed, which is the speed of light. Blue light has a shorter wavelength than red light.

A Photon of Blue Light and a Photon of Red