1.

A 60 watt bulb is hung over the center of a table 4 m ´ 4 m at a height of 3 m. The ratio of the intensities of illumination at a point on the centre of the edge and on the corner of the table is                                              [CPMT 1976, 84]

A.            \[{{(17/13)}^{3/2}}\]         
B.            2 / 1
C.            17 / 13                                     
D.             5 / 4
Answer» B.            2 / 1


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