Question

1. What is refracted index? 2. Differentiate between real images and virtual images

Answer 1

Refractive index is the ratio of speed of light in the given medium by speed of light in vacuum.

Real images;
1) Image is formed due to actual intersection of light rays
2) It is always inverted.
3) It can be obtained on the screen

Virtual images:
1) The image is due to the apparent intersection of light rays
2) It is always erect
3) It cannot be obtained on the screen

Answer 2

Real Image

Real images are produced by intersecting rays.

Real images can be projected on a screen

Real images are formed by two opposite lens, concave and convex.

Real images are always inverted

Real images are created when rays of light are converged by a convex lens also known as converging lens.

The image is formed on the right-hand side of the lens.

Virtual Image

The image that cannot be obtained on a screen is known as virtual image.

A virtual image is created when rays of light diverge from a concave lens.

A virtual image is formed on the left-hand side of the lens.

Virtual image are produced by diverging rays

Virtual image cannot be projected on screen

Virtual images are always upright while real images are always inverted.