Answer:
I can't read the questions they aren't in the photo
Answer:same
Explanation:
Frequency will remain same irrespective of refractive index of material because frequency is the ratio of velocity and wavelength .
When a wave travel from one material to another then its wavelength and velocity changes in that medium and they adjust itself to give same frequency
Answer:
the answer is C
Explanation:
C) friction - mechanical - electrical
<span><span>-When sunlight strikes a falling drop of water it is refracted, changed indirection, by the surface of the water.</span>
The light continues into the drop and is reflected from the back of the drop to the front. When the beam hits the front it is refracted again and emerges from the drop as the color spectrum that we see in a rainbow.<span>-The water drop acts like a prism to seperate the light into its different wave lengths.</span></span>