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?

A mobile phone lies along the principal axis of a concave mirror, as shown in the figure. Then,

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 \(5\) cm in front of a concave mirror with a radius of curvature of \(15\) cm. The nature of the image is:

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. \(10~\text{m/s}\)$\mathrm{}$