A light wave can travel (a) in vacuum (b) in vacuum only (c) in a material medium

(a) √3/√2 is the correct option

Correct Answer is: (d)  Sound is transmitted by particles (atoms or molecules) in a solid, liquid or gas colliding with each other. It is a wave which is created by vibrating...

Given,n=1.5 and the speed of light in vacuum, c = 3x 108 ms-1. We know that the refractive index is given by the expression n =c/v where c is the...

In medium 'X' because of lower value of refractive index.

(d) between 0 and 2A. EXPLANATION:  The amplitude of the resultant wave depends on the phase difference between the two waves. If the phase difference is zero then the resultant amplitude is...

The correct answer is (a) A EXPLANATION:   The resultant amplitude   y = A sin(⍵t-kx) + A sin(⍵t-kx+120°)    →y = 2A Sin(⍵t-kx+60°)*cos60°    →y = A sin(⍵t-kx+60°)      Hence the resultant amplitude is A.

(d) neither on elasticity nor on inertia. EXPLANATION:    The light does not require even a medium. The speed of light in a medium is the intrinsic property of that medium which...

The correct answer is (a) x = c. EXPLANATION:    The wavefronts are perpendicular to the direction of the light. Since here the light is traveling along X-axis, the wavefront will be a...

(b) light goes from optically denser medium to rarer medium EXPLANATION:  When the light goes from a denser medium to lighter medium, it goes away from the normal. When the angle of...

(d) All those who travel by air are rich.