Draw a diagram to show how an image is produced by a pair of total reflecting prisms arranged as in a periscope.
Important Questions on Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre
State the laws of refraction. Distinguish between absolute refractive index and refractive index of a medium. Show that , where letters have usual meanings.
Explain why does a swimming pool appears shallower than it actually is. Obtain an expression for the normal displacement of an object immersed in water.
Explain, with ray-diagram, total internal reflection of light. Give two conditions for it to take place. Obtain relation between critical angle and refractive index of the denser medium.
Show, by a ray-diagram, how a totally reflecting glass prism can be used to deviate a ray through .
Show, by ray-diagram, how a totally reflecting glass prism can be used to deviate a ray through .
What is an optical fibre? On what principle does it work? Explain by ray-diagram, how optical fibres transmit signals. Mention one practical application of optical fibres.
Explain the refraction of light, write its laws and also write the basic cause of refraction of light. Derive the relation .
