Question

1) Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49 × 1014 H

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2) Calculate your own wavelenngth using average walking velocity of 1 m/s. Hint: mass equals your body weight.

Answer 1

1)

we have:

frequency = 5.49*10^14 s-1

we have below equation to be used:

Energy = Planck constant*frequency

=(6.626*10^-34 J.s)*(5.49*10^14) s-1

= 3.64*10^-19 J

Answer: 3.64*10^-19 J

2)

my mass is 65 Kg

so, we have:

v = 1 m/s

mass, m = 65 Kg

we have below equation to be used:

wavelength = Planck constant / (mass*velocity)

wavelength = (6.626*10^-34) / (65*1)

wavelength = 1.02*10^-35 m

Answer: wavelength = 1.02*10^-35 m