The speed of light in vacuum is equal to:

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Concept: We know that light is a non-mechanical wave, which can travel in a vacuum also without any need for a medium. It is also very much known that light travels faster in vacuum or air than any medium. Despite having particle nature, light travels as an electromagnetic wave.
Propagation of light is defined as the manner in which light travels from one point to another. The propagation of light is associated with the transfer of energy from one point to another.
The speed of light in vacuum is equal to 3×

10^{8}

s^{- 1}

. speed of light is given with the following formula:-
The speed of light in the vacuum is given by the formula

Where,

permeability of vacuum or air

permittivity of air.
Where c denotes the speed of light in vacuum or air, μoμo is permeability of vacuum and εo is the permittivity of vacuum or air.
When light travels in a vacuum there is no scattering occurring, therefore the beam of light is invisible in a vacuum.
Hence, option 4 is correct.

Watch 3-min video & get full concept clarity