Question

please help to solve these problems.....​

Answer 1

Answer:

1) frequency = speed of light/ wavelength

=(3*10^8)/(580*10^[-9])

=5.17*10^14 Hz

wave number= 1/wavelength

=1/580*10^[-9]

=1.724*10^6 per meter

2)

i)Energy= planck's constant * frequency

Energy =6.67*10^[-34] * 3*10^15

=2*10^[-19] joules

ii)Energy=planck's constant * (speed of light/wavelenght)

=6.67*10^[-34] * (3*10^8/5*10^[-11])

4*10^[-15] joules

3) Total energy = number of photons * energy of each photons

{energy of each photon =planck's constant * (speed of light/wavelenght)

energy of each photon= 6.67*10^[-34] * (3*10^8/4*10^[-9])

energy of each photon= 5*10^[-17]}

Total energy = n * energy of each photon

n=Total energy/ energy of each photon

n= 1/5*10^[-17]

n=2*10^16

Answer 2

Answer:

1)The wave number of yellow light, νˉ=λ1=580×10−9m1=1. 72×106/m.

2)(i) The energy of photon is

E=hν=6.626×10−34Js×3×1015 m/s

=1.988×10−18J

(ii) The energy of photon is

E=λhc=0.50×10−10m6.626×10−34Js×3×108

=3.98×10−15s

3)1J is energy of photons =14.969×10-17=2.012×1016 photons.

Explanation:

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