6.A man of height 1.8 m stands in front of large vertical plane mirror. The distance of the image from the man if he stands at a distance of 1.5 m from the mirror is:

7.Mark correct option.

8.A ray is reflected in turn be three plane mirrors mutually at right angles to each other. The angle between the incident and the reflected rays is:

9.In cold countries the phenomenon of looming (i.e., ship appears in the sky) takes place, because refractive index of air:

10.A plane mirror is infornt of you in which you can see your image. It is approaching towards you at a speed of 10 cm/s, then at what speed will your image approach you?