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CBSE Class 11-science Answered

A photograph of a house occupied an area of 1.75 sq.cm on a 35mm slide.The slide is projected on to a screen and the area of the house on the screen is 1.55 sq.m.What is the linear magnification of the projector-screen system?

Asked by pb_ckt | 22 May, 2019, 10:19: AM
Expert Answer
Area of photograph ocupied on slide is  = 1.75 sq.cm 
 
Area of photograph occupied on screen is = 1.55 cm 
 
Thus, 
L i n e a r space m a g n i f i c a t i o n space equals space square root of fraction numerator 1.55 space over denominator 1.75 space cross times space 10 to the power of negative 4 end exponent end fraction end root
therefore space L i n e a r space m a g n i f i c a t i o n space equals space 94.112 space
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