Total Internal Reflection and Critical Angle
Total Internal Reflection and Critical Angle: Overview
This topic deals with the concept of total internal reflection and critical angle. Total internal reflection in nature and its technological applications are also explained here.
Important Questions on Total Internal Reflection and Critical Angle
A point source of light is placed at a distance h below the surface of a large deep lake. What is the percentage of light energy that escapes directly from the water surface is μ of the water = 4/3? (neglect partial reflection)
An optical fibre is based on:
What is a total reflecting prism? State three actions that it can produce. Draw a diagram to show one action of the total reflecting prism.
Which of the following is not due to total internal reflection?
Write a note on optical fibre.
Total internal reflection can happen when light enters from rarer medium to denser medium.
What is the phenomenon that is employed in the making of a diamond?
Calculate the refractive index of medium whose critical angle is with respect to air.
A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is and the fish is below the surface of water, what is the radius of the circle?
Which of the following is not due to total internal reflection?
Diamonds are known for their spectacular brilliance, but diamonds found in nature rarely exhibit the brilliance.
What is an ideal cut diamond?
Total internal reflection will occur if-
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.
Assertion: Critical angle of the light passing from glass to air is minimum for violet colour.
Reason: The wavelength of violet light is greater than the light of other colours.
A diver in a swimming pool wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light
What is the refractive index of the fiber core?
A light beam entering an optical fiber makes an angle of with the fiber core-fiber clad boundary surface. If the fiber core and clad refractive indices are and respectively, can this beam propagate along the fiber?
Small values of numerical aperture (NA) decrease the pulse dispersion but increase losses due to
