A lens is placed between a source of light and a wall. It forms images of area A1 and A2 on the wall for its two different positions. The area of the source of right is
(a) √(A_1 A_2 )
(b) (A_1+A_2)/2
(c) (A_1-A_2)/2
(d) 1/A_1 +1/A_2
A lens is placed between a source of light and a wall. It forms images of area A1 and A2 on the wall for its two different positions. The area of the source of right is
(a) √(A_1 A_2 )
(b) (A_1+A_2)/2
(c) (A_1-A_2)/2
(d) 1/A_1 +1/A_2
Hrishant Goswami , 11 Years ago
Grade 10
