প্রতিবিম্ব

The focal length of a digital camera is 7.50 cm.It focuses on an object 1.85m tall which is 4.25 m away from the lens.How far must the lens be from the sensor array?

IUT 19-20

v=(f−1−u−1)−1=[(0.075)−1−(4.25)−1]−1=0.07635 m=7.635 cm v=\left(f^{-1}-u^{-1}\right)^{-1}=\left[(0.075)^{-1}-(4.25)^{-1}\right]^{-1}=0.07635 \mathrm{~m}=7.635 \mathrm{~cm}

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