Physics
(i) State the relation between the critical angle and the absolute refractive index of a medium.
(ii) Which colour of light has a higher critical angle? Red light or Green light.
Related Questions
The power of a lens is –5D.
(i) Find it's focal length.
(ii) Name the type of lens.
State the position of the object in front of a converging lens if:
(i) It produces a real and same size image of the object.
(ii) It is used as a magnifying lens.
The following diagram shows a 60°, 30°, 90° glass prism of critical angle 42°. Copy the diagram and complete the path of incident ray AB emerging out of the prism marking the angle of incidence on each surface.
(i) Define scattering.
(ii) The smoke from a fire looks white.
Which of the following statements is true?
- Molecules of the smoke are bigger than the wavelength of light.
- Molecules of the smoke are smaller than the wavelength of light.