Question

What is light?

• A. A form of energy
• B. The natural agent that stimulates sight and makes things visible
• C. A wave that can propagate without any medium
• D. A wave that can pass through all the objects

Answer 1

Answer: (A), (B), (C)

A wave that can propagate without any medium

Light is the part of the electromagnetic spectrum that our eyes can see. In other words, it is a form of energy that enables us to see all the things around us. The word usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight. Light cannot pass through all the objects. It can only pass through transparent objects like glass. Light can propagate without medium as is evident in the case of sunlight which falls on Earth, travelling through empty space.