An air bubble in water behaves like a ……………………
A) converging lens
B) diverging lens
C) convex lens
D) none
1 Answers
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A spherical marble, of refractive index 1.5 and curvature 1.5 cm, contains a tiny air bubble at its centre.
Correct answer is (B) at the centre
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If a nation behaves aggressively with another country, the second country should ……………..
C) try to solve the issue with political bilateral discussion
2 Answers 4 views
When air is blown from mouth into a test tube containing lime water, the lime water turned milky.
(D) Carbon dioxide
2 Answers 1 views
The refractive index of glass for light going from aif’to glass is 3/2. The refractive index of air for light going from glass to air ………………….
Correct option is C) 4/6
2 Answers 1 views
The refractive index of glass with respect to air is 3/2 and the refractive index of water with respect to air is 3/2.
Correct option is D) 8/9
2 Answers 1 views
The Convex lens behaves as a converging lens if it is kept in a medium with refractive index less than the refractive index of the lens.
B) Both statements are false
2 Answers 1 views
Air bubble in water behaves like a diverging lens because ……………………
A) refractive index of air is less than the refractive index of water
2 Answers 1 views
A sound note emitted from a certain source has a velocity of 300 m/s in air and 1050 m/s in water. If the wavelength of sound note in air is 2 m
Correct option is: (C) 7 m
2 Answers 1 views
An antenna behaves as resonant circuit only when its length is ………
Correct option is: (D) n λ/2
2 Answers 1 views
Ionisation enrgy of a h-like ion (A) is greater than that of another H-like ion (B) Let r, u, e and (L) represent the radius fo the orbit speeed of th
Correct Answer - C::D
2 Answers 1 views