1.

an object and a concave mirror of focal length 20 cm approach each other with a speed of 1 cm/s and 2 cm/s respectively. at the instant when the object is at a distance of 15 cm from the mirror the speed of image isa:50 cm/sb:18 cm/s

Answer» an object and a concave mirror of focal length 20 cm approach each other with a speed of 1 cm/s and 2 cm/s respectively. at the instant when the object is at a distance of 15 cm from the mirror the speed of image is
a:50 cm/s
b:18 cm/s


Discussion

No Comment Found