The exposure time of a camera lens at the f/2 | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The exposure time $t$ is proportional to the square of the $f$-number,i.e.,$t \propto (f_{number})^2$.Given $t_1 = 1/200 \, s$ at $f_1 = 2.8$.We n

Vedclass · Accepted Answer

$0.02$

Vedclass · Answer

(B) The exposure time $t$ is proportional to the square of the $f$-number,i.e.,$t \propto (f_{number})^2$.Given $t_1 = 1/200 \, s$ at $f_1 = 2.8$.We need to find $t_2$ at $f_2 = 5.6$.Using the ratio: $\frac{t_2}{t_1} = \left( \frac{f_2}{f_1} ight)^2$.Substituting the values: $\frac{t_2}{t_1} = \left( \frac{5.6}{2.8} ight)^2 = (2)^2 = 4$.Therefore,$t_2 = 4 	imes t_1 = 4 	imes \frac{1}{200} = \frac{1}{50} \, s$.$t_2 = 0.02 \, s$.

The exposure time of a camera lens at the $f/2.8$ setting is $1/200$ second. The correct time of exposure at $f/5.6$ is......$sec$

Similar Questions

Ray optics is valid when characteristic dimensions are:

Which of the following phenomena are involved in the formation of a rainbow?

How can we change a camera from $F/4$ to $F/5.6$?

If $\hat{n}_1$ is the unit vector along the incident ray,$\hat{n}_2$ is the unit vector along the normal,and $\hat{n}_3$ is the unit vector along the reflected ray,then which of the following must be true?

$A$ man wishing to get a picture of a Zebra photographed a white donkey after fitting a glass with black streaks onto the objective of his camera.

Vedclass Test Series

Exam Paper Generator

Online Exam Module