A student obtained a sharp image of a burning candle, placed at the farther end of a laboratory table, on a screen using a concave mirror. For getting better value of focal length of the mirror, the subject teacher suggested him for focussing a well illuminated distant object. What should the student do?

When light falls on a smooth mirror surface, it undergoes:

One of the law of reflection is :

In concave mirror, principal focus is

If any object is placed at the centre of curvature of a concave mirror, then its image is formed at _____.

If any object is placed beyond centre of curvature of a concave mirror, the position of image will be:

If we focus the concave mirror to reflect sunlight towards a point at a distance $‘\mathrm{x}’$, skin burn is sensed. The distance $\mathrm{x}$ is equal to _____.

If a concave mirror is dipped in water then its focal length will__