20 Most Important MCQs of PLANE CONCAVE CONVEX MIRROR & LENS in Hindi || Quikr Exam

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Q1 In the case of a concave mirror, the image of an object is

 

1. Real, erect and diminished when the object lies beyond the centre of curvature
2. Real, inverted and of the same size as the object when it lies between the centre of curvature and focus
3. Real, inverted and diminished when the object lies beyond the centre of curvature
4. Not real, large and proportional

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 Q2 Short-sight’ in human eye can be corrected by using proper

1. convex lens
2. concave lens
3. cylindrical lens
4. bifocal lens

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  Q3 mirage occurs because of

1. reflection by hot ground
2. total internal reflection by layers of air
3. interference of light
4. diffraction of light

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 Q4 What would be the number of images formed of an object in two mirrors placed at right angles to each other?

1. two
2. three
3. four
4. six

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 Q5 The head mirror used by E.N.T doctors is

1. Concave
2. Convex
3. Plane
4. Plano-convex

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Q6 The human eye is like a camera and hence it contains a system of lens. The eye lens forms

1. a straight or upright, real image of the object on the retina
2. an inverted, virtual image of the object on the retina
3. an inverted, real image of the object on the retina
4. a straight or upright, real image of the object on the iris

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 Q7 Which one among the following is used to make periscope?

1. Concave lens
2. Concave mirror
3. Plane mirror
4. None of the above

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  Q8 What type of a mirror is used in anti-shop-lifting-devices?

1. Concave mirror
2. Convex mirror
3. Plane mirror
4. None of the above

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Q9 Due to which phenomena the stick if immersed in water appears to be bent?

1. Reflection
2. Dispersion
3. Refraction
4. Scattering

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Q10 What is the power of concave lens?

1. Positive
2. Negative
3. Both
4. None of the above

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