1. If the angle of incidence of a ray of light falling on glass surface is 60° and the angle of refraction is 30°. What is the refractive index of glass?
2. Rays from sun converge at a point 15cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of object?
3. Size of image of an object by a mirror having a focal length of 20cm is observed to be reduced to 1/3rd of its size. At what distance the object has been placed from the mirror? What is the nature of image and the mirror?
4. A 10mm long awl pin is placed vertically in front of a concave mirror. A 5mm image of the awl pin is formed at 30cm in front of the mirror. What is the focal length of this mirror?
5. If a child crawls towards a mirror at a rate of 0.20m/s, then at what speed will the child and her image come nearby to each other?
6. Define refractive index of medium A with respect to medium B?
7. What is the focal length of a plane mirror?
8. A ray of light is propagating from medium A to medium B. If the refractive index of medium B w.r.t. A is 1.5, what will be the refractive index of medium A w.rt. B?
9. State Snell's law with the help of suitable ray diagram.
10. Which mirror is used for rear view in vehicles and why?
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