Question

When you approach a light source, the wavelength of emitted light appears _____.

a. shorter
b. the same
c. longer

Answer 1

A. shorter

Step-by-step explanation:

I just took the test.

Answer 2

When you approach a light source, or when the light source
approaches you, the wavelength of the light you see is shorter
than the wavelength of the light that's actually emitted by the source.

Similarly, when you approach a sound source, or when the sound
source approaches you, the wavelength of the sound you hear is
shorter than the wavelength of the sound that's actually emitted by
the source.