Physics of light

Which is the correct statement of the law of reflection?

• Incident ray is equal to reflected ray

• Incident ray is equal to refracted ray

• Incident angle is equal to reflected angle

• Incident angle is equal to refracted angle

When light arrives at surface of mirror, it _________.

What is the angle of reflection when a ray of light strikes a mirror at an angle of 30 degrees?

• 30 degrees

• 60 degrees

• 90 degrees

• 120 degrees

What happens to the angle of reflection when the angle of incidence is increased?

• It decreases

• It increases

• It remains the same

• It becomes zero

The diagram shows a ray of light arriving at a mirror. Write the letter that shows the direction of the ray that has been reflected by the mirror.

• A

• B

• C

• D

Which one is incident anlge?

• A

• B

• C

• D

Which one is reflected angle?

• A

• B

• C

• D

Which type of mirror is shown in the diagram?

• Curved

• Even

• Plane

• Line

When a ray of light passes from air into water, it changes direction. This is called ______________.

The speed of light _________ when light passes from air into glass.