Question

What is Critical angle .(Explain in 6 - 7 lines)

Answer 1

1.When the angle of incidence in water reaches a certain critical value, the refracted ray lies along the boundary, having an angle of refraction of 90-degrees.
2.This angle of incidence is known as the critical angle
3.it is the largest angle of incidence for which refraction can still occur.
4.For any angle of incidence greater than the critical angle, light will undergo total internal reflection.

hope this much will help you

Answer 2

Answer:

hi mate ,

good morning ,

have a nice day ,

for critical angle you need a teacher , teacher explain you very well