Question

The red light from the ant passed into the lens

Answer 1

Answer:

When red light enters the lens its wavelength decreases but its frequency remains the same.

Explanation:

Lens is made of glass which is a denser medium when compared with air. Thus light will undergo refraction and bend toward the normal. On entering  a denser medium from rarer medium the speed of light decreases.

Speed, frequency and wavelength of an electromagnetic wave are related according to the equation.

                                                                v=ϑλ

Where is v is the frequency,  λ is the wavelength and v is the speed of the em wave.

On entering the lens the wavelength of the red light as well as speed decreases but the frequency remains the same.