List any five properties of light. - Science

List any five properties of light.

Answer in Brief

Light is a form of energy.
Light always travels along a straight line.
Light does not need any medium for its propagation. It can even travel through a vacuum.
The speed of light in a vacuum or air is c = 3 × 10⁸ ms^-1.
Since light is in the form of waves, it is characterized by a wavelength (k) and a frequency (v), which are related by the following equation: c = v λ (c – velocity of light).
Different coloured light has different wavelength and frequency.
Among the visible light, violet light has the lowest wavelength and red light has the highest wavelength.
When light is incident on the interface between two media, it is partly reflected and partly refracted.

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Chapter 2: Optics - Evaluation [Page 30]

Chapter 2 Optics
Evaluation | Q VII. 1. | Page 30

Match the following

(a). A light ray passes from air to glass	(1) . speeds up
(b). A light ray passes from glass to water	(2). reflects red light
(c). Virtual image	(3). primary colours
(d). Red rose	(4). plane mirror
(e). Red, green, and blue	(5). slows down

Does the flame of a gas stove emit light?

Tick the correct answer.

Light is a font of

Fill in the blank

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

Write true or false

The moon has its own light.

Answer the following.

Differentiate between luminous and non-Luminous objects.

A ______ is an artificial source of light.

Mirrors change the direction of light that fall on them.

Sunlight is a blend of______ colors

What is light?