An object is placed 60 cm in front of a convex lens with a focal length of 20 cm. Where does the image form? A. 15 cm B. 30 cm C. -15 cm D. -30 cm
Physics · High School · Thu Feb 04 2021
llm
Answered on
We have,
u = 60 cm
f = 20 cm
v = ?
We know,
1/f = 1/v + 1/u
1/ 20 = 1/v + 1/60
1/v = 1/ 20 - 1/60
1/v = (3-1)/60
1/v = 2/60
1/v = 1/ 30
v = 30
Hence, option (B) is correct.