A tall man, of height 66 feet, wants to see his full image. The required minimum length of the mirror will be:
1. | 1212 feet | 2. | 33 feet |
3. | 66 feet | 4. | Any length |
The correct mirror image of the figure is:
1. | ![]() |
2. | ![]() |
3. | ![]() |
4. | ![]() |
Two plane mirrors, AA and BB are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle of 30∘30∘ at a point just inside one end of A.A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (excluding the first one) before it emerges out is:
1. 2828
2. 3030
3. 3232
4. 3434
Light of wavelength 5000 ˚A5000 ˚A falls on a plane reflecting surface. For what angle of incidence is the reflected ray normal to the incident ray?
1. 37∘37∘
2. 45∘45∘
3. 90∘90∘
4. 0∘0∘
1. | 1010 m/s2 |
2. | 2020 m/s2 |
3. | 55 m/s2 |
4. | can't be determined |
A point source of light BB is placed at a distance LL in front of the centre of a mirror of width dd hung vertically on a wall. A man (A)(A) walks in front of the mirror along a line parallel to the mirror at a distance 2L2L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is:
1. d2d2
2. dd
3. 2d2d
4. 3d3d
1. | 4040 km/h | 2. | 7070 km/h |
3. | 2020 km/h | 4. | 9090 km/h |
1. | real |
2. | virtual |
3. | depends on the nature of the object |
4. | none of these |
An object is placed 20 cm20 cm in front of a concave mirror of a radius of curvature 10 cm.10 cm. The position of the image from the pole of the mirror is:
1. 7.67 cm7.67 cm
2. 6.67 cm6.67 cm
3. 8.67 cm8.67 cm
4. 9.67 cm9.67 cm
1. | smaller in size. |
2. | inverted. |
3. | between the focus and centre of curvature. |
4. | All of the above. |