The shape of a spot of light produced when bright sunshine
passes perpendicular
through a hole of very small size is
(a) Square, because the hole is a square
(b) Round, because it is an image of the sun
(c) Round with a small penumbra around it
(d) Square with a small penumbra.
Answer / krpg
ans is (b)Round, because it is an image of the sun.
Is This Answer Correct ? | 2 Yes | 0 No |
An electron emits energy (a) Because its in orbit (b) When it jumps from one energy level to another (c) Electrons are attracted towards the nucleus (d) The electrostatic force is insufficient to hold the electrons in orbits.
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Some forms are books. All books are made of paper (a) Some forms are made of paper (b) Some forms are not made of paper (c) No forms are made of paper (d) None of the above.
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