The wrong rule of sign convention is :

(i) All distances are measured from the centre of curvature of the mirror taken as origin.

(ii) The distances measured along the principal axis in the direction of incident light are positive.

(iii) The distances above the principal axis are taken positive.

1. (i)
2. (ii)
3. (iii)
4. both (i) and (ii)

For a convex mirror, the value of u is always …………… and the value of v is ……………

1. positive, positive
2. positive, negative
3. negative, negative
4. negative, positive

The type of mirror used as a shaving mirror in daily life is :

1. plane mirror
2. convex mirror
3. concave mirror
4. parabolic mirror

The type of mirror used as a reflector in the street lights is :

1. plane mirror
2. convex mirror
3. concave mirror
4. parabolic mirror