Advertisements
Advertisements
Question
State whether the following statement is true or false:
Refraction occurs because light slows down in denser materials.
Advertisements
Solution
This statement is true.
Explanation:
The refraction of light is due to the change in the speed of light when going from one medium to other. The speed of a light ray slows down in denser materials.
RELATED QUESTIONS
Define the following terms used in the study of reflection of light by drawing a labelled ray-diagram:
- Incident ray
- Point of incidence
- Normal
- Reflected ray
- Angle of incidence
- Angle of reflection
A ray of light strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is ______.
Explain how to read the following message which was found on some blotting paper:

State two effects caused by the refraction of light.
As light rays pass from water into glass, are they refracted towards the normal or away from the normal?
Show the lateral displacement of the ray on the diagram.
List four characteristics of the image formed by a concave lens of focal length 20 cm when the object is placed at a distance of 40 cm from its optical centre.
Due to _______ pencil looks bent in water, in the given experiment.

Explain the working of a periscope.
Under what circumstances there won’t be any refraction of light when it enters from one medium to another?
