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).

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

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

as total internal reflection occurs from denser to rarer medium then how it happens in prism? as prism is dense than air

The magnitude of the lens’ radii of curva- ture are R1 = 2.616 cm and R2 = 1.962 cm.
Assume: The lens is made of glass whose index of refraction is 1.51.
Note: This is the same lens that is shown in the figure above.
What is the focal length of this lens? Answer in units of cm.