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Geometrical Optics
A mirror whose polished, reflecting surface is a part of a hollow sphere of glass or plastic is known as
plane mirror
virtual mirror
silver mirror
spherical mirror
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Geometrical Optics
The radius of the sphere of which spherical mirror is a part is known as
radius of curvature
pole
center of curvature
focal length
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Geometrical Optics
An object and its image in a concave mirror are of the same height, yet inverted when the object is 30 cm from the mirror. The focal length of the mirror should be
10 cm
12 cm
15 cm
18 cm
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Geometrical Optics
The types of spherical mirrors are
2
3
4
5
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Geometrical Optics
The condition in which the image is formed behind the retina is called
Farsightedness
Nearsightedness
image defect
blind spotting
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Geometrical Optics
For a concave mirror, the focus is
real
virtual
erect
bent
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Geometrical Optics
One of the angle of a right-angled prism is
30 °
45 °
90 °
60 °
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Geometrical Optics
The variation of focal length to form a sharp image on retina is called
accommodation
aperture
retina control
Sutter
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Geometrical Optics
The convex lens becomes a magnifying glass when
object is placed inside lens’s focal length
object is placed at focal length
object is placed behind focal length
object is placed inverted in front of the lens
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rikazzz
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Geometrical Optics
The lens which causes incident parallel rays of light to diverge at a point is called
convex lens
concave lens
counter lens
fiber lens
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