Question

(8%) Problem 11: A camera with a 50.0 mm focal length lens is being used to photograph a person standing 3.75 m away. A 50% Part (a) How far, in centimeters, must the film be from the lens? 50% Part (b) If the film is s = 36.0 mm high, what percent of the width of the film will a 135 m tall person take up? Wel/s (%) =

Answer 1

Write lens formula

+

$=> \frac{1}{d_{i}} + \frac{1}{3.75} = \frac{1}{0.05}$  

=> 1 - 375 - 0.05 3.

=>d; = 0.05067m = 50.675mm --- Answer

$Magnification =- \frac{d_{i}}{d_{o}}$

Magnification =- 0.05067 3.75 -= -0.0135

Also Magnification = 7

$=> h_{o}= \frac{h_{i}}{m} = \frac{36}{0.0135} = 2666.66mm$

If the film is 36mm high then max height of object can be 2.667m to fit all.

$Answer - {\color{Red} 100 \; percent}$

Answer 2

Write lens formula

+

  

=> 375 0.05

=> 1 - 375 - 0.05 3.

=>d; = 0.05067m = 50.675mm --- Answer

$Magnification =- \frac{d_{i}}{d_{o}}$

Magnification =- 0.05067 3.75 -= -0.0135

Also Magnification = 7

$=> h_{o}= \frac{h_{i}}{m} = \frac{36}{0.0135} = 2666.66mm$

If the film is 36mm high then max height of object can be 2.667m to fit all.

$Answer - {\color{Red} 100 \; percent}$