Answer:
[tex]INTNESITY = 0.88W/m^{2}[/tex]
Explanation:
given data:
power P = 40W
Distance of light bulb from screen is R = 1.9 m
The light intensity considered as the light energy falling on the surface per unit area per unit time
Intensity of light can be determined by using following formula
[tex]intesnity = \frac{P} {4\pi R^{2}}[/tex]
[tex]intesnity = \frac{40} {4\pi *1.9^{2}}[/tex]
[tex]INTNESITY = 0.88W/m^{2}[/tex]
