Geometrical Optics
Both virtual and real images can be formed by a
plane mirror
convex mirror
concave mirror
silver mirror
concave mirror
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The critical angle for glass isA. 50 ยฐ
B. 42 ยฐ
C. 45 ยฐ
D. 30 ยฐ
The endoscope used to examine the bladder is called
A. cystoscope
B. gastroscope
C. microscope
D. bronchoscope
In photograph enlarger, the object is placed
A. between F and 2F
B. beyond 2F
C. at F
D. less than F
The iris has an opening at its center which is called
A. cornea
B. pupil
C. retina
D. chord
The reflection by the smooth surfaces is called
A. regular reflection
B. irregular reflection
C. regular refraction
D. irregular refraction
Water separates the colors of sunlight into a rainbow due to
A. rain
B. dispersion in sunlight
C. dispersion in drops
D. clouds
The lens which is thick at center and thin at edges is
A. concave lens
B. biconcave lens
C. convex lens
D. biconvex lens
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