Total Internal Reflection

Periscope is fitted with:

Periscope is used to :

Why prisms are used in binoculars.

Which action of prism in used in prism binocular and certain type of camera

Describe working of prism binoculars in brief

Why is prism binoculars preferred over traditional binoculars?

The most appropriate reason for the use of prism in preference to a mirror in a periscope is that:

Explain the structure and working of optical fibre in brief.

Give one application of optical fibre in the medical field.

Why the refractive index of core is kept higher than the refractive index of cladding in an optical fibre?

Write a note on optical fibre.

Advantages of optical fiber communications over two wire transmission line or co - axial cable transmission are

Assertion: Optical fibre has thin glass core coated by glass of small refractive index and is used to send light signals.

Reason: All the rays of light entering the fibre are totally reflected even at very small angles of incidence.

What is the refractive index of the fiber core?

A light beam entering an optical fiber makes an angle of $10°$ with the fiber core-fiber clad boundary surface. If the fiber core and clad refractive indices are $1.5$ and $1.49$ respectively, can this beam propagate along the fiber?

Small values of numerical aperture (NA) decrease the pulse dispersion but increase losses due to

If ${\mu }_1$ and ${\mu }_2$ are the refractive indices of the material of core and cladding of an optical fiber, then the loss of light due to its leakage can be minimised by having

The principle used in the transmission of signal through an optical fibre is

The optical fibres have an inner core of refractive index $n_1$ and a cladding of refractive index $n_2$ such that

What happens inside optical fibre?