Light and sound

Question 1

what is the law of reflection

Answer 1

Angle of incidence =The angle of reflection

Question 2

What is the definition of refraction

Answer 2

The wave changing direction when it moves from one material into another

Question 3

why does refraction happen

Answer 3

This happens because the wave changes speed moving from one material to another

Question 4

how do you calculate Refractive index

Answer 4

n = sin (i)/ sin(r)
i- angle of incidence
r - angle of reflection

Question 5

can light waves be refracted

Answer 5

yes all waves can be refracted

Question 6

what types of waves are light and sound

Answer 6

sound is longitudinal
Light waves are transverse

Question 7

What is the critical angle

Answer 7

Angle of incidence when angle of refraction =90

Question 8

how do you calculate the critical angle

Answer 8

sin (c)= 1/ n (refractive index of a material)

Question 9

What happens when light enters less dense material

Answer 9

slows down
turns towards the normal

Question 10

what happens when light enters a more dense material

Answer 10

speeds up
turns away from the normal