What is light? Define it.

Definition

Light is a form of Energy i. e. The external physical cause that affects our eye to produce the sensation of vision.

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Chapter 5: Light - Short/Long answer questions

Chapter 5 Light
Short/Long answer questions | Q 1

How do we see objects around us ?

Write true or false of the following statement.

The moon is self-luminous.

Select the correct alternative.

The natural source of light is

Explain the difference between a transparent, a translucent, and an opaque medium. Give two examples of each.

Why do objects in a room become visible even if sunlight does not enter it?

Fill in the blank

There are ........... and man-made ............ of light.

Answer the following.

Name some sources of light that are not hot.

Speed of light in air is 3 × 10⁸ m s^–1 and the refractive index of a medium is 1.5. Find the speed of light in the medium.

Describe the pictures.

List any five properties of light.