atomic easy one

JEE Mains 2015 Sample Questions › Physical Chemistry questions › atomic easy one

If wavelength of photon is 2.2 * 10^{-11} m, h = 6.6 * 10^{-34} J-sec, then momentum of photon is

#Chemistry #Physical Chemistry

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7 Answers

11

Devil ·2010-04-26 07:01:02

E=hk, where k is the frequency, E is the enrgy, from where u can get the momentum.

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cute_cat ·2010-04-26 07:01:55

but that will b too long na...???

some tips for smaller calculations??

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cute_cat ·2010-04-26 07:02:08

another one

If electron falls from n = 3 to n = 2, then emitted energy is

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Manmay kumar Mohanty ·2010-04-26 07:02:19

yup first u find E then use relation
p = h√2mE

i thnk that will do [1]

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cute_cat ·2010-04-26 07:03:36

and what to put in place of m?

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Manmay kumar Mohanty ·2010-04-26 07:03:37

for second one use
1Î» = RZ[1n₁ - 1n₂]

then use E = hc/Î»

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cute_cat ·2010-04-26 07:13:32

but hw to shorten the calculations???????????????

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