Thought provoking problems on optics
By These problems are from pre-test conducted in teacher's workshops by Prof HC Verma and his team.
- Light of wavelength 500 nm is incident on a aperture of following size. What can be said about the validity of ray optics in each of the above cases?
- 100 times the wavelength
- 1000 times the wavelength
- 10 times the wavelength
- A parallel beam of light goes into a transparent box and returns. From the box the light comes as a divergent beam. Which the following are the possible optical instrument in the box? (a) A plane mirror (b) a concave mirror (c) a convex mirror.
- Interpret the graph given below. Here v and u are the image positions and object positions measured in metres for a lens/mirror. Identify the lens/mirror. Find the focal length of the lens/mirror from the graph. Mark regions which represent the real and virtual image as well as real and virtual object.
