(c) In an aquarium, a fish 6 cm long is swimming directly towards the plane glass front If, at - Physics - Ray Optics And Optical Instruments

Question

(c) In an aquarium, a fish 6 cm long is swimming
directly towards the plane glass front If, at a certain moment,
head of the fish is 18 cm behind the glass front, find the apparent
length of the fish as seen by a person looking through the glass
Given R I of water =4/3

Decoder_2 · Accepted Answer

Dear
student,

apparent depth=actual depthrefractive index of waterapparent depth of head=1843=272apparent depth of tail=18+643=18cmlength of image of fish=18-272=4
5cm
Regards

(c) In an aquarium, a fish 6 cm long is swimming directly towards the plane glass front. If, at a certain moment, head of the fish is 18 cm behind the glass front, find the apparent length of the fish as seen by a person looking through the glass. Given R.I. of water =4/3.