Question

(a) Name the phenomenon responsible for change in the path of rays. (b) Identify the device X (c) What is point A called? (d) What is the distance between device X and point A called? *​

Answer 1

To find:

• Phenomenon responsible for change in the path of rays.

• Device X

• Distance between device X and point A.

Solution:

• The phenomenon responsible for change in the path of rays is known as refraction. Whenever an electromagnetic ray (like light) passes from one optical medium to another it undergoes a change in velocity which results in changing direction of the rays.

• The device X is a bi-convex lens.

• The distance between Device X and point A is called focal length of the bi-convex lens.

Other points to remember:

• Bi-convex lens are are also known as converging lens.

• The reciprocal of the focal length will give us the power of the lens. It denotes the converging capability of the lens.

$\star$ Hope It Helps.