Question

the radius of curvature of concave mirror is 50cm. where should an object be placed so as to form its image at infinity justify your answer.

Answer 1

Answer:

to form image at infinity the object should be placed at F principal focus

as we know R radius of curvature= 2 F

F = R/2

F = 50/2

F = 25

as it is a concave mirror focal length is always

(-) ve

:. object should be placed at a distance of -25 cm