Optics Answers

Light of wavelength 5800A°falling at nearly normal incidence gets reflected from a soap film of refractive index 1.4.what is the least thickness of the film that will appear bright and dark?

Newtons ring are formed with reflected light of wavelength 5895A°with a liquid between the plane and curved surface .The diameter of 5 th ring is 0.3cm and radius of curvature is 1 m.determine the refractive index of liquid?

in Newton ring experiment the diameter of 5 th dark ring is reduced to half its value on introducing a liquid between lens and glass plate.determine the refractive index of liquid

For an emission of wavelength 5000 Angstrom, at what temperatures both spontaneous and stimulated emissions will be same?

Question-5
Stefania is 1.5 m tall. Prove that the shortest mirror necessary
for Stefania to see her full height is 75 cm (half her height).

explain why there is only lateral (left-right) reversal when we look at ourselves in a plane mirror?

A gratting of width 2inches is ruled with 15000 lines per inch. Find the smallest wavelength separation that can be resolved in second order at a mean wavelength of 500nm

Fraction of light emerging from isotropic point source through conical region having semi vertex angle t and with its apex at source

in a thin spherical fish bowl of radius 10 cm filled with water of refractive index 4/3 there is a small fish at a distance of 4 cm from the center c as shown in figure. where will the image of fish appears if seen from e

The bowl has a diameter of 30 cm. The distance from the bowl to the object is 75 cm, and the object size is 6 cm.

(a) what is the focal length of the mirrored surface of the bowl?
(b) what is the position of the image

(c) what is the size of the image