If you bring an object to half of the original distance,the apparent brightness will be 4 times as bright as before.

Name: If you bring an object to half of the original distance,the apparent brightness will be 4 times as bright as before.
Brand: Quizplus
Rating: 4.9 (30 reviews)

Question

Quizplus · Accepted Answer

According to the inverse square law of light, the apparent brightness of an object is inversely proportional to the square of the distance from the observer. Therefore, if the distance is halved, the brightness increases by a factor of $ (1/0.5)^2 = 4 $.

If You Bring an Object to Half of the Original