- 1(current)
Q. No.A beam of light from a source \(L\) is incident normally on a plane mirror fixed at a certain distance \(x\) from the source. The beam is reflected back as a spot on a scale placed just above the source \(L.\) When the mirror is rotated through a small angle \(\theta,\) the spot of the light is found to move through a distance \(y\) on the scale. The angle \(\theta\) is given by:
| 1. | \(\dfrac{y}{x}\) | 2. | \(\dfrac{x}{2y}\) |
| 3. | \(\dfrac{x}{y}\) | 4. | \(\dfrac{y}{2x}\) |
1. \(45^\circ\)
2. \(30^\circ\)
3. \(55^\circ\)
4. \(50^\circ\)
An object and a plane mirror are shown in the figure. The mirror is moving with velocity \(V\) as shown. The velocity of the image is:
1. \(2Vsin\theta\)
2. \(2V\)
3. \(2Vcos\theta\)
4. none of these
A ray of light is directed toward a corner reflector as shown. The incident ray makes an angle of \(22^\circ\)
| 1. | \(22^\circ\) | 2. | \(68^\circ\) |
| 3. | \(44^\circ\) | 4. | \(34^\circ\) |
- 1(current)
Q. No.
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