Question

Which of the following is not a property of light?
A. It requires a material medium for propagation.
B. It can travel through vacuum
C. It involves transportation of energy
D. It has finite speed

Answer 1

Hint: To know which one of the options is not the property of light, as we know that light is electromagnetic in nature that is directly related to the propagation of the light. As we also know, light has some speed in vacuum, air and water too.

Complete answer:
Light doesn’t require any material medium for propagation. In option (A), Light requires a material medium for propagation:- So, light is electromagnetic in nature; it does not require any material medium for its propagation. The propagation of electric and magnetic fields oscillating at right angles to one another and travelling through space at the speed of light, c, produces light. The induction of a magnetic field from a time-dependent electric field is explained by Maxwell's addition to Ampere's law.So, the option (A) is not a property of light.

Now, in option (B), Light can travel through vacuum:- Light is an electromagnetic wave that does not need to be transmitted through a medium. Particle-wave duality is a feature of photons in light. As a result, they have the ability to behave as both particles and waves. As a result, light does not need a medium to propagate. They have the ability to travel in a vacuum.So, option (B) is the property of light.

In option (C), Light involves transportation of energy:- Light energy is a sort of kinetic energy capable of causing different types of light to be visible to human vision. Light is an electromagnetic radiation that is emitted by heated things such as lasers, bulbs, and the sun. Photons are tiny energy packets that make up light.So, the option (C) is the property of light.

In option (D), Light has finite speed:- As we all know, light has some finite or fixed speed that is already measured in a unit. The speed of light is $3 \times {10^8}m.{s^{ - 1}}$.So, the option (D) is also the property of light.

Hence, the correct option is (A).

Note: Light is an electromagnetic wave emitted by hot things such as lasers, bulbs, and the sun. Light is a type of kinetic energy that allows us to see or make objects visible with our eyes. The human eye can see light energy, which is a type of electromagnetic radiation.