Which of the following is correct for light d | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) For a point source of light, the light waves spread out in all directions, forming spherical wave fronts.As the distance $r$ from the source incre

Vedclass · Accepted Answer

Intensity decreases in proportion to the distance squared.

Vedclass · Answer

(D) For a point source of light, the light waves spread out in all directions, forming spherical wave fronts.As the distance $r$ from the source increases, the surface area of the spherical wave front increases as $A = 4\pi r^2$.Since the total power $P$ emitted by the source is constant, the intensity $I$ is given by $I = P / A = P / (4\pi r^2)$.Therefore, the intensity $I$ is inversely proportional to the square of the distance $r$, i.e., $I \propto 1/r^2$.This means the intensity decreases as the distance from the source increases.

Which of the following is correct for light diverging from a point source?

Similar Questions

The wavefront of a distant source of unknown shape is approximately

When wavefronts pass from a denser medium to a rarer medium, the width of the wavefront

What is the shape of the wavefront of light diverging from a point source?

The wavefront of a wave has what direction with respect to the wave motion?

The idea of secondary wavelets for the propagation of a wave was first given by

Vedclass Test Series

Exam Paper Generator

Online Exam Module