the screen of a pinhole camera is a square of side 0.16 and it is 0.15 m behind the pinhole the camera is placed 11 metres from a flagstaff and position so that the image of the flagstaff is formed cement rally on the screen the image occupies 3/4 of the height of screen what is the height of the flagstaff? what are the major disadvantages of a pinhole camera compared to a lens camera
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Explanation:
Answer:The side of the screen pinhole is
a
=
0.16
m
The distance from the pinhole to the screen is
d
=
0.15
m
The distance from the flag to the pinhole is
D
=
11
m
The expression of the scale factor is given by,
f
=
d
3
4
(
a
)
Substitute all the values in the above equation.
f
=
(
0.15
m
)
(
3
4
)
(
0.16
m
)
=
1.25
The expression of the height of the flag-staff is given by,
H
=
D
f
Substitute all the values in the above equation.
H
=
11
1.25
=
8.8
m
Thus, the height of the flag-staff is 8.8 m.
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