Question

What is light? What do you mean by rectilinear propagation of light???



please help me​

Answer 1

LIGHT:

in a word light is a flow of energy as a electromagnetic wave.

RECTILINEAR PROPAGATION:

The rectilinear propagation of light means that light travels in straight lines as a wave. This can be observed in the well-defined shadows formed when an object blocks a light source and through the use of a pinhole camera.

Answer 2

Required Answers:

You have provided two questions related to Optics, Optics is the study of light. So, Let's know about the questions.

1) What is light?

• Light is the form of energy.
• Light gives us sensation of vision.
• It has dual nature i.e. wave and particle nature.
• It is an electromagnetic wave.
• It does not require any material medium.
• The speed of the light is 3 × 10⁸ m/s.
• Light is massless because it is energy.
• It can be reflected, refracted(transmitted) or absorbed when it travels from one medium to another medium.

2) What is Rectilinear propagation of light?

• Light follows some basic phenomena.
• One of these phenomena is Rectilinear propagation of light.
• As the name says, it means light travels in straight lines or straight paths.
• It is because, light always prefer quickest path rather than shortest path to reach another point.

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