Question

a. When a light ray travels through a transparent medium, then its
propagation changes. (speed/direction)
of
b.
A convey lens is also​

Answer 1

Explanation:

we know that C=fλ where C is the speed of light wave, f is frequency of light wave and λ is wavelength of light wave . Frequency of the light wave remains constant in any medium so when light wave goes rarer to denser medium, it's speed decreases hence the wavelength of