Given below are two statements:
Statement I: | Image formation needs regular reflection and/or refraction. |
Statement II: | The variety in colour of objects we see around us is due to the constituent colours of the light incident on them. |
1. | Statement I is correct but Statement II is incorrect. |
2. | Statement I is incorrect but Statement II is correct. |
3. | Both Statement I and Statement II are correct. |
4. | Both Statement I and Statement II are incorrect. |
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. | \(\dfrac{y}{2x}\) |
A tall man, of height \(6\) feet, wants to see his full image. The required minimum length of the mirror will be:
1. | \(12\) feet | 2. | \(3\) feet |
3. | \(6\) feet | 4. | Any length |