Q. 1. If a ray of light is incident on a plane mirror at an angle I, by what angle is it deviated?
Q. 2. The refractive indices of glass of yellow, green and red color are uu, uq and ur. Rearrange these symbols in the increasing order of their values.
Q. 3. A girl in the mirror laughing house finds her face appearing highly magnified, lower portion of her body of the same size but laterally inverted and middle portion f her body highly diminished in size. Guess the design of the mirror?
Q. 4. How does a focal length of a convex lens changes if
A monochromatic red light is used instead of blue light?
It is placed in water?
Q. 5. Is it possible for a lens to act as a converging lens in one medium and a diverging lens in other? How?
Q. 6. An object is kept in front of a concave lens of focal length 15 cm. The image formed is three times the size of the object. Calculate two possible distances of the object from the mirror?
Q. 7. An object is placed at a distance of one and a half of the focal length of a concave mirror. Find the position of the image in terms of f. Also find the magnification and nature of the image formed by the mirror.
Q. 8. A concave mirror produces three times magnified real image of an object, placed 10cm from it. Where is the image located?
Q. 9. The image of a needle placed at 45 cm from a lens is formed on a screen placed at 90 cm on the other side of the lens. Find the displacement of the image when the object is moved 5cm from the lens.
Q. 10. Where should an object be placed from a convex lens of f=20cm so as to obtain an Image of magnification 2.
