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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.
Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.
Calculate the speed of light in a medium whose critical angle is 30° ?
Solve the previous problem if the paperweight is inverted at its place so that the spherical surface touches the paper.
(i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium.
For a ray of light, the critical angle is minimum when it travels from ______.
Optical fibre communication uses the principle of ______.
What is the phenomenon used in optical fiber? Explain.
State the condition under which total internal reflection occurs. Give the mathematical expression for total internal reflection.
- Assertion (A): Propagation of light through an optical fibre is due to total internal reflection taking place at the core-cladding interface.
- Reason (R): Refractive index of the material of the cladding of the optical fibre is greater than that of the core.
