If the distance between point light source and screen is doubled then intensity of light will be:

Question

If the distance between point light source and screen is doubled then intensity of light will be: (A)  text4I  (B)  text2I  (C)  textI/2  (D)  textI/4

Tardigrade Admin · Accepted Answer

Intensity is inversely proportional to the square of distance between source and screen. So, if distance is doubled, then intensity will become (1/4)th .

Q. If the distance between point light source and screen is doubled then intensity of light will be:

$4I$

$2I$

$I/2$

$I/4$

Intensity is inversely proportional to the square of distance between source and screen. So, if distance is doubled, then intensity will become $\frac{1}{4} t h$ .