The size of the face of a dancer is 24 cm ×16 cm. The minimum size of a plane mirror required to see the face of dancer completely by
(i) one eyed dancer. (ii) two eyed dancer
(Distance between the eyes is 4 cm)
(i) 12x8 cm2, (ii) 12x6 cm2
(i) For one eyed dancer, the minimum size of mirror should be half of the face size.
So, minimum size
(ii) For two eyed dancer minimum length of mirror
The minimum width of mirror
So required size
The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122nm. The smallest wavelength in the infrared region of the hydrogen spectrum (To the nearest integer)is:
A point source S is centered in front of a 70 cm wide plane mirror. A man starts walking from the source along a line parallel to the mirror at a distance 2L from it.
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If two adjacent walls and the ceiling of a rectangular room are mirror surfaced, then how many images of himself, a man can see?
Two bodies A and B are moving towards a plane with speeds VA and VB respectively as shown in figure. The speed of image of A with respect to the body B is
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