a) On what principle does a pinhole camera work?
b) State the characteristics of image formed by a pinhole camera
c) Draw a ray diagram to show the image formed by a pinhole
camera
d) State advantages and disadvantages of pinhole camera.
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a) the rectilinear theory of light
b)The characteristics of image are as follows -
(i) The image formed is real hence it can be formed on the screen
(ii) It is inverted
(iii) It is generally smaller than the size of the object
d)Advantages of a pinhole camera
No focusing is required.
There is no lens in the pinhole camera and therefore, the image is free from any spherical and chromatic aberrations.
Disadvantages of a pinhole camera
The image formed does not give any details. Usually, it is faint.
Image is obtained on the screen and no permanent
record of the image can be obtained.
Pinhole camera cannot be used for studying moving objects.
for c) part refer image
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