Choose the correct mirror image of the figure:
    

1. 2.
3. 4.

Subtopic:  Reflection at Plane Surface |
 77%
From NCERT
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If there had been one eye of a man, then:

1. image of the object would have been inverted
2. visible region would have decreased
3. image would have not been seen in three dimensional
4. Both (2) and (3)

Subtopic:  Human Eye |
 55%
From NCERT
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The near point of a person is 50 cm and the far point is 1.5 m. The spectacles required for reading purposes and for seeing distant objects are respectively:

1. + 2D, \(-\frac{2}{3}~D\)
2. \(+\frac{2}{3}~D\), - 2 D

3. - 2 D, \(+\frac{2}{3}~D\)

4. \(-\frac{2}{3}~D\), + 2 D

Subtopic:  Human Eye |
 71%
From NCERT
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An astronomical refracting telescope will have large angular magnification and high angular resolution when it has an objective lens of:

1. Small focal length and large diameter
2. Large focal length and small diameter
3. Large focal length and large diameter
4. Small focal length and small diameter

Subtopic:  Telescope |
 62%
From NCERT
NEET - 2018
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An air bubble in a glass slab with refractive index 1.5 (near-normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is:

1. 8 2. 10
3. 12 4. 16
Subtopic:  Refraction at Plane Surface |
 74%
From NCERT
NEET - 2016
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If the focal length of the objective lens is increased, then magnifying power of:

1. microscope will increase but that of telescope decrease
2. microscope and telescope both will increase
3. microscope and telescope both will decrease
4. microscope will decrease but that of the telescope will increase
Subtopic:  Simple & Compound Microscope |
 67%
From NCERT
AIPMT - 2014
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A ray of light is incident at an angle of incidence, i, on one face of a prism of angle A (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is μ, the angle of incidence i is nearly equal to:

1. \(\mu \mathrm{A} \) 2. \(\frac{\mu A}{2} \)
3. \(A / \mu \) 4. \(A / 2 \mu\)
Subtopic:  Prisms |
 69%
From NCERT
AIPMT - 2012
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A concave mirror of the focal length f1 is placed at a distance of d from a convex lens of focal length f2. A beam of light coming from infinity and falling on this convex lens-concave mirror combination returns to infinity. The distance d must be equal to:

1. f1+f2

2. -f1+f2

3. 2f1+f2

4. -2f1+f2

Subtopic:  Refraction at Curved Surface |
From NCERT
AIPMT - 2012
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The magnifying power of a telescope is 9. When it is adjusted for parallel rays the distance between the objective and eyepiece is 20 cm. The focal lengths of lenses are:

1. 10 cm, 10 cm

2. 15 cm, 5 cm

3. 18 cm, 2 cm

4. 11 cm, 9 cm

Subtopic:  Telescope |
 85%
From NCERT
AIPMT - 2012
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In an astronomical telescope, the focal length of the objective lens is 100 cm and of the eyepiece is 2 cm. The magnifying power of the telescope for the normal eye is:

1. 50

2. 10

3. 100

4. 150

Subtopic:  Telescope |
 89%
From NCERT
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