(a) Use conceptual arguments to show that the intensity of light (energy per unit area per unit time) reaching the film in a camera is proportional to the square of the reciprocal of the f -number as 11eb7e53_1f8a_6179_bc75_2bbf349c7e4a_SM7473_11 (b) The correct exposure time for a camera set to f /1.8 is (1/500) s. Calculate the correct exposure time if the f -number is changed to f /4 under the same lighting conditions. Note: " f /4," on a camera, means "an f - number of 4."

College Physics 10th Edition by Raymond Serway,Chris Vuille

النسخة 10الرقم المعياري الدولي: 978-1285737041

College Physics 10th Edition by Raymond Serway,Chris Vuille

النسخة 10الرقم المعياري الدولي: 978-1285737041

تمرين 56

(a) Use conceptual arguments to show that the intensity of light (energy per unit area per unit time) reaching the film in a camera is proportional to the square of the reciprocal of the f -number as

(b) The correct exposure time for a camera set to f /1.8 is (1/500) s. Calculate the correct exposure time if the f -number is changed to f /4 under the same lighting conditions. Note: " f /4," on a camera, means "an f - number of 4."

التوضيح

موثّق

(a)
The intensity is defined as amount o...