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PPSC Physics Topic 4 Geometrical Optics
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Total Questions20
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Time Allowed20
PPSC Physics Topic 4 Geometrical Optics
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Question # 1
To final image produced by a compound microscope is.
Question # 2
The final image produced by a microscope is.
Question # 3
When we decrease the diameter of the objective lens of a telescope the resolution of telescope
Question # 4
The power of lens in dioptres is
Question # 5
A leser beam may be used to measure very large distance because it is.
Question # 6
The focal length of a thin converging lens is 10 cm What is the maximum distance from the lens that the object can be placed so the lens acts as a magnifying glass.
Question # 7
The function of collimator in spectrometer is to
Question # 8
When a ray of light traveling in a rare medium enters into a denser medium
Question # 9
When a ray of light is incident perpendicularly to the boundary of two media.
Question # 10
In compound microscope image formed by the eyepiece is
Question # 11
The image formed by a projector is
Question # 12
The bending of light when it enters a medium
Question # 13
A ray of light from air into glass The angle of incidence is 30o if the refractive index of glass in 1.52 The angle of refraction will be.
Question # 14
Which law states that the angle of incidence equals the angle of refraction.
Question # 15
A bi convex lens of a material of refractive index 1.5 has the radius of curvature of each side equal to 50 cm the power of the lens will be.
Question # 16
A Fly is found to be sitting on a telescope when it is focused towards the moon What effect is expected on the photograph of the moon.
Question # 17
An object of placed at the centre of curvature of a concave mirror The image produced by the mirror is located.
Question # 18
To obtain is parallel beam from the headlight of a car it must be fitted with.
Question # 19
When an obliquely falling ray of light enters from one medium ot another it changes its path this phenomenon is called.
Question # 20
A simple astronomical telescope consists of two
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