Physics Misc. 3
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Physics Misc. 3
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17 Questions

1. In the case of a concave mirror, the image of an object is
2. A ray of light composed of blue light and red light is incident on a plate of glass as indicated. When the light emerges from the other side of the glass plate, the two coloured beams will appear at
3. Two wires A and B, of the same material, have their lengths in the ratio of 1:2 and their diameters in the ratio of 2:1. If they are stretched with the same force, the ratio of the increase in the length of A and that of B will be
4. A ray of light is to pass symmetrically through a prism of refractive index 1.732 and the angle of the prism is equal to 60° as in the diagram. The angle of incidence is
5. Out of the following pair, which one does not have an identical dimension?
6. Which one of the following optical devices should be used to produce a convergent beam from a point of a source of light?
7. When a pencil is partly immersed in water in a beaker and held in a slanting position, the immersed portion appears
8. Which arrangement among the following gives an upright magnified image? Type of lens Distance of the object from the lens
9. A beam of light passes from a glass of refractive index 1.5 into water of refractive index 1.3. How do speed and wavelength of the light alter? Speed Wavelength
10. Two plane mirrors placed vertically at an angle to each other so that they form five images of the object placed between them is
11. Two plane mirrors are inclined at an angle of 30°. The number of images produced is
12. To increase the magnifying power of a telescope, the focal length of the
13. A ray of light is incident at an angle of incidence i1, at one face of an equilateral glass prism and emerges out at an angle of emergence i2 from the second face. If the prism is at minimum deviation position,
14. A camera lens is marked '8 cm, f/16'. This means that the diameter (or aperture) of the lens is
15. When an object is placed at a distance of 2f from a converging lens, the image obtained is
16. A convex lens has a focal length of 10 cm. An object of height 5 cm is placed at a distance of 20 cm from the lens. The size of the image is
17. In the case of motors and lorries moving along a bend, the centripetal force is provided by

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