Explanation:
The setup shown is that of Young's Double Slit Experiment.
The fringe width in the experiment is given as $\beta=\frac{\text{D}\lambda}{\text{d}}$
where d is the distance between the slits, D is the distance between screen and slits.
Hence the central fringe also widens when distance between screen and slits increases.
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In the following diagram the work done in moving a point charge from point P to point A, B and C is respectively as WA, WB and WC , then
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(a) WA = WB = WC |
(b) WA = WB = WC = 0 |
(c) WA > WB > WC |
(d) WA < WB < WC |
The half-life of a radioactive substance is 40 years. How long will it take to reduce to one fourth of its original amount and what is the value of decay constant
| (a) 40 year, 0.9173/year | (b) 90 year, 9.017/year |
| (c) 80 year, 0.0173 year | (d) None of these |
The curve between charge density and distance near P-N junction will be
(a)
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(b)
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(c)
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(d)
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