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प्रश्न
What is total internal reflection?
Explain total internal reflection of light.
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उत्तर
Total internal reflection is the phenomenon when a ray of light travelling in a denser medium is incident at the surface of a rarer medium such that the angle of incidence is greater than the critical angle for the pair of media, and the ray is totally reflected back into the denser medium.
संबंधित प्रश्न
A ray of light travels from water to air as shown in the diagram given below :
1) Copy the diagram and complete the path of the way. Given the critical angle for water is 48°.
2) State the condition so that internal reflection occurs in the above diagram.
State two conditions necessary for total internal reflection to occur.
Write the necessary conditions for the phenomenon of total internal reflection to
occur ?
Total internal reflection can take place only if ______.
Define critical angle for a given medium.
How does a ray of light bend when it travels from rarer to denser medium
State two advantages of using a right-angle prism as a reflector, rather than a plane mirror.
How is the critical angle of a material related to its refractive index?
Draw a diagram, properly labelled, to illustrate the use of a total reflecting prism (a right-angled isosceles prism) to turn a ray of light through 180°. Name an instrument in which this device is used.
A ray of light is incident on a glass surface at an angle of 50° with the corresponding angle of refraction 30°. Find the value of the R.I. of glass.
Choose the correct option.
Consider the following phenomena/ applications: P) Mirage, Q) rainbow, R) Optical fibre and S) glittering of a diamond. Total internal reflection is involved in
Which of the following is not involved in formation of a rainbow?
Explain ‘mirage’ as an illustration of refraction.
The outer concentric shell in optic fiber is called ______.
Which of the following statements about total internal reflection is true?
A ray of light passes from vacuum into a medium of refractive index µ, the angle of incidence is found to be twice the angle of refraction. Then the angle of incidence is ______.
Small air bubbles rising up a fish tank appear silvery when viewed from some particular angle is due to the ______.
State two differences between normal reflection and total internal reflection.
