1. Difference between apparent and real depth of the pond
2. Mirage on hot summer days
3. Brilliance of the diamond
4. Working of optical fibre
A ray of light travelling in a transparent medium of refractive index falls on a surface separating the medium from the air at an angle of incidence of 45 °. For which of the following value of , the ray can undergo total internal reflection?
The speed of light in media M1 and M2 is 1.5 × 108 m/s and 2.0 × 108 m/s respectively. A ray of light enters from medium M1 to M2 at an incidence angle i. If the ray suffers total internal reflection, the value of i is -
1. Equal to or less than sin–1
2. Equal to or greater than sin–1
3. less than sin–1
4. Equal to sin–1
A small coin is resting on the bottom of a beaker filled with a liquid. A ray of light from the coin travels upto the surface of the liquid and moves along its surface (see figure).
How fast is the light traveling in the liquid?