Light Waves II - SS3 Physics Past Questions and Answers - page 1
Which of these is not a property of lenses?
Focal length
Aperture
Refractive index
Magnification
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Aberrations of lenses are________
obstructions or obstacles that prevent image from being produced by a lens
corrections or improvements in the quality of the image produced by a lens
openings or channels by which the image is produced by a lens
distortions or imperfections in the image produced by a lens
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Magnification is the ________
The rate at which an object is enlarged by a lens
The degree to which an object is enlarged by a lens
The speed with which an object is formed by a lens
The distance between an object and its image formed by a lens
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A convex lens is used to
Reflect light waves to a focal point
Diverge light waves from a focal point
Converge light waves at a focal point
Diffract light waves from a focal point
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A concave lens is used to
Enlarge light waves
Reinforce light waves
Focus light waves
Diverge light waves
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What is a lens and how many types are there?
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What is the importance of lenses and their properties?
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Which of the following optical instruments is used to magnify small objects?
Telescope
Microscope
Spectroscope
Periscope
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Which part of the eye is responsible for controlling the amount of light that enters the eye?
Iris
Pupil
Lens
Retina
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What type of lens is used to correct farsightedness?
Convex lens
Concave lens
Plano-convex lens
Plano-concave lens
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