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CBSE - Light Refraction
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Practice Question
Light Refraction
.
Light Refraction
A convex lens of suitable focal length can correct man' s eye problem of
(1) Short sightedness
(2) Long sightedness
(3) Presbyopia
(4) Astigmatism
Correct Answer: 2
.
Related Questions
Light Refraction
1
A convex lens of suitable focal length can correct man' s eye problem of
(1) Short sightedness
(2) Long sightedness
(3) Presbyopia
(4) Astigmatism
Correct Answer: 2
2
The absolute refractive index of any medium is
(1) 1
(2) > 1
(3) < 1
(4) 0
Correct Answer: 2
3
A lens have power +5D. This lens will be
(1) a convex lens of focal length 0.05 m.
(2) a concave lens of focal length 0.20 m.
(3) a convex lens of f ocal lengt h 0. 20 m
(4) a concave lens of focal length 0.05 m
Correct Answer: 3
4
You are provided with a concave lens having focal length 15 cm. If it diminishes the image by one-third, calculate the distance of image from lens?
(1) 5 cm
(2) 10 cm
(3) 5 m
(4) 10 m
Correct Answer: 1
5
Wavelength of violet colour is
(1) 7900 Aº
(2) 6000 Aº
(3) 5800 Aº
(4) 4000 Aº
Correct Answer: 4
