Question

Identify the following.

Answer 1

Answer:

angle of reflection: B

angle of refraction: E

normal line: G

incident ray: H

boundary: I

Explanation:

When a wave incidents on a boundary, some of it bounces back and some transmits and refracts. From the laws of reflection we know that angle of incidence is equal to angle of reflection. The incident ray, the reflected ray and the normal all lie in same plane. From Snell's law, the angle of refraction differs from angle of incidence as the wave travels from one medium to another.

In the given diagram,

H represents the incident ray.

I represents the boundary.

G represents the normal.

Angle of incidence is given by A.

Angle of reflection is given by B.

Angle of refraction by E.

F represents the refracted ray.

Answer 2

Ok,

The angle of reflection is D as the ray is bounced off the mirror.
The angle of refraction is E since the ray is refracted and changes speed.
The normal line is G.
The incident ray is H.
The boundary is I.

Hope this helps :).