1.

The illuminance of a small area changes from 900 lumen m−1 to 400 lumen m−2 when it is shifted along its normal by 10 cm. Assuming that it is illuminated by a point source placed on the normal, find the distance between the source and the area in he original position .

Answer»

The illuminance of a small area changes from 900 lumen m1 to 400 lumen m2 when it is shifted along its normal by 10 cm. Assuming that it is illuminated by a point source placed on the normal, find the distance between the source and the area in he original position .



Discussion

No Comment Found