Question

If the distance of the screen is moved from 100. Cm to 200. Cm the area of light would in-crease from 150. Cm^2 to A. 37.5 cm2 B. 75 cm2 C. 300 cm2 D. 600 cm2

Answer 1

75 cm

Step-by-step explanation:

The distance of the screen varies inversely proportional to the area subtended.

`(d_1)/(d_2)=(A_2)/(A_1)\\(100)/(200)=(A_2)/(150)\\A_2=75 cm`

When the distance is increased from the screen, the area would decrease to 75 cm.