Optics Answers

The speed of light in air is 300, 000 km/s. What is the speed of light in glass if the refractive index of glass is 1.5

Using simple ray theory, describe the mechanism for the transmission of light within
an optical fiber. Briefly discuss with the aid of a suitable diagram what is meant by
the acceptance angle for an optical fiber. Show how this is related to the fiber
numerical aperture and the refractive indices for the fiber core and cladding.
An optical fiber has a numerical aperture of 0.20 and a cladding refractive index of
1.59. Determine:
(a) the acceptance angle for the fiber in water which has a refractive index of 1.33;
(b) the critical angle at the core–cladding interface.
Comment on any assumptions made about the fiber.

In a Michelson’s Interferometer 200 fringes cross the field of view when the movable mirror is displaced through 0.0589 mm. Calculate the wavelength of monochromatic light used.

A silica optical fibre has a core refractive index of 1.50 and a cladding refractive index of 1.45. Determine the critical angle at the core cladding interface. *

the visible light of wavelength 350 NM to 800 NM is incident normally on a thin film with refractive index 4 it is observed that three wavelength 720 NM, 480 NM and 360 NM are compulsory missing from reflected spectra find the minimum thickness of a film.

You have an infrared laser that produces light of an unknown wavelength.
A. You shine this laser through a mask containing a single slit of width a. On a screen that is a
distance L away, you find a very broad bright spot at the center of the screen that has a width of
L. Determine the wavelength of the laser in terms of the given quantities.
B. You shine the same laser through a different mask containing a single slit that

calculate the coherence time and coherence length of white light of wave length range of 3500 angstrom to 6500 angstrom

what is a virtual image?