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eduhilfe
Asked: January 21, 2021In: MAKAUT

3.(a) In a Young’s double slit experiment the fringes are formed at a distance of 1m from the double-slit of separation 0.12 mm. Calculate the distance of 3^{rd} dark band from the centre of the screen. Given wavelength of light is 6000 \AA.

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makaut-2019ph-101-physics-1sem-1
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eduhilfe
Asked: January 21, 2021In: MAKAUT

4.(b) The refractive index of E-ray and o-ray are respectively 1.65 and 1.45. Then find the thickness of the material required to make a quarter wave plate for light of wavelength 5000 \AA.

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makaut-2019ph-101-physics-1sem-1
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eduhilfe
Asked: January 21, 2021In: MAKAUT

5. What is Compton effect ? Calculate the Compton shift in wavelength for a photon scatters from a free electron at an angle \theta ?

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makaut-2019ph-101-physics-1sem-1
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eduhilfe
Asked: January 21, 2021In: MAKAUT

7.(a) String from the equation of motion and after solving it show that, for a forced oscillator in the steady state, the displacement amplitude at low frequency (\omega \rightarrow 0) , the velocity amplitude at velocity resonance (\omega = \omega_0) are independent of the frequency of the driving force.

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makaut-2019ph-101-physics-1sem-1
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eduhilfe
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eduhilfe
Asked: January 21, 2021In: MAKAUT

8.(b) how will the radius of the Newton’s ring change if air is replaced by oil between the lens and glass plate? Explain it. A film of oil of refractive index 1.70 is placed between a plate and an equi-convex lens. The focal length of the lens is 1 metre. Determine the radius of the 10^{th} dark ring when the wavelength of the light used is 6000 \AA

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makaut-2019ph-101-physics-1sem-1
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eduhilfe
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eduhilfe
Asked: January 21, 2021In: MAKAUT

10.(d) Show that the relative momentum, p=\frac{\sqrt{k(k+2E_0)}}{c} , where k is the kinetic energy, E_0 is the rest mass energy of the electron and c is the velocity of light.

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makaut-2019ph-101-physics-1sem-1
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eduhilfe
Asked: January 21, 2021In: MAKAUT

11.(b) Show that in a cubic crystal of side a, the interplaner spacing between consecutive parallel planes of miller indices (hkl) is d_{hkl} = a / \sqrt{h^2+k^2+l^2}

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makaut-2019ph-101-physics-1sem-1
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Sayani saha
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Sayani saha
Asked: January 21, 2021In: MAKAUT

11(d). Prove that the intensity of x-rays decreases exponentially with the thickness of the material. Show the variation graphically.

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makaut-2019makaut-mcqph-101-physics-1sem-1
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Sayani saha
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Sayani saha
Asked: January 21, 2021In: MAKAUT

11(c). Molybdenum has a BCC structure and its atomic radius is 0.1653 nm. What is the interplaner spacing for (220) plane?

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makaut-2019makaut-mcqph-101-physics-1sem-1
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Sayani saha
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Sayani saha
Asked: January 21, 2021In: MAKAUT

11(a). Calculate the interplanner spacing ‘d’of planes(111) in a simple cubic lattice of side ‘a’.

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makaut-2019makaut-mcqph-101-physics-1sem-1
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