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.
As given in question
By similar triangle
JH = 70 cm Similarly KI = 70 cm
Therefore JK = 70 + 70 + 35 + 35 = 210 cm.
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:
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)
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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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