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Wave Optics

Question

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A certain mass of hydrogen is changed to helium the process of fusion. The mass defect in fusion reaction is 0.02866 u. The energy liberated per u is (given 1 u =931 MeV)

2.67 MeV

26.7 MeV

6.675 MeV

13.35 MeV

Solution

C.

6.675 MeV

Here comma space increment straight m equals 0.02866 space straight U therefore comma Energy space liberated equals space fraction numerator 0.02866 space straight x space 931 over denominator 4 end fraction space equals space fraction numerator 26.7 over denominator 4 end fraction space MeV space equals space 6.675 space MeV

Some More Questions From Wave Optics Chapter

Answer the following questions, which help you understand the difference between Thomson's model and Rutherford's model better.
Is the probability of backward scattering (i.e., scattering of α-particles at angles greater than 90°) predicted by Thomson's model much less, about the same, or much greater than that predicted by Rutherford's model?

Answer the following questions, which help you understand the difference between Thomson's model and Rutherford's model better.
Keeping other factors fixed, it is found experimentally that for small thickness t, the number of α-particles scattered at moderate angles is proportional to t. What clue does this linear dependence on t provide?

Answer the following questions, which help you understand the difference between Thomson's model and Rutherford's model better.
In which model is it completely wrong to ignore multiple scattering for the calculation of average angle of scattering of α-particles by a thin foil?

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