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Q. No.Suppose that the lower half of the concave mirror’s reflecting surface in the given figure is covered with an opaque (non-reflective) material. What effect will this have on the image of an object placed in front of the mirror?
| 1. | the image will show only half of the object |
| 2. | the image will show the whole of the object |
| 3. | the intensity of the image will be low |
| 4. | both (2) and (3) |
A mobile phone lies along the principal axis of a concave mirror, as shown in the figure. Then,
| 1. | the magnification is not uniform due to the length of the object along the principal axis. |
| 2. | the distortion of the image depends on the location of the phone with respect to the mirror. |
| 3. | both (1) and (2) |
| 4. | none of these |
An object is placed at \(10\) cm in front of a concave mirror with a radius of curvature of \(15\) cm. The magnification of the image is:
1. \(-3\)
2. \(3\)
3. \(1\)
4. \(-1\)
An object is placed at \(5~\text{cm}\) in front of a concave mirror with a radius of curvature of \(15~\text{cm}.\) The nature of the image is:
| 1. | magnified, real, and inverted |
| 2. | magnified, virtual, and erect |
| 3. | magnified, real, and erect |
| 4. | none of these |
Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view mirror of \(R= 2~\text{m}.\) If the jogger is running at a speed of \(5~\text{m/s},\) how fast does the image of the jogger appear to move when the jogger is \(39~\text{m}\) away?
1. \( 5~\text{m/s}\)
2. \(\dfrac{1}{60}~\text{m/s}\)
3. \(\dfrac{1}{280}~\text{m/s}\)
4. \(10~\text{m/s}\)
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Q. No.
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