1.

A lamp is hanging 1 m above the centre of a circular table of diameter 1m. The ratio of illuminaces at the centre and the edge is                                                        [NCERT 1982]

A.            \[\frac{1}{2}\]                      
B.            \[{{\left( \frac{5}{4} \right)}^{\frac{3}{2}}}\]
C.            \[\frac{4}{3}\]                      
D.            \[\frac{4}{5}\]
Answer» C.            \[\frac{4}{3}\]                      


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