9.C] Determine the wavelength of X-rays for crystal size of 1.188×10-6 m, peak width is 0.5o and peak position 30o, for a cubic crystal. Given Scherrer’s constant k=0.92. Answer:-
10.C] The first order Bragg reflection occurs when a monochromatic beam of X-rays of wavelength 0.675Ao is incident on a crystal at a glancing angle of 4o. What is the glancing angle for third order Bragg’s reflection to occur? Answer:-
10.B] With neat diagram, explain the principle, construction and working of X-ray photoelectron spectroscope. Answer:- Principle Surface analysis by XPS involved irradiation of the sample by low-energy (and mono-energetic) X-rays and the subsequent analysis of the energy of emitted electrons.…
10.A] Explain the construction and working of X-Ray diffractometer. Answer:- Principle of X-Ray Diffractometer:X-ray diffractometer is based on the principle of Braggs’ Law The constructive interference of monochromatic Xrays reflected by a crystalline sample is studied. Construction of XRD The…
9.A] With neat diagram, explain the principle, construction and working of Atomic Force Microscope. Answer:- Principle of AFM:- The AFM measures the forces acting between a fine tip and a sample. The tip is attached to the free end of…
9.C] X-rays are diffracted in the first order from a crystal with d spacing 2.8 × 10−10 m at a glancing angle 60 °. Calculate the wavelength of X-rays. Answer:-
2.C] Compare the Mach number of a Jet fighter traveling with 2000 km hr-1 with that of a bullet traveling with a velocity of 400 ms-1 in the same medium given the speed of sound in the medium 330 ms-1.…
3.C] The kinetic energy of an electron is equal to the energy of a photon with a wavelength of 560 nm. Calculate the de Broglie wavelength of the electron. Answer:-
6.C] Compare the acceptance angle of an optical fiber placed in air and water given the RI of water 1.33 and the RI of core and clad 1.5 and 1.45 respectively. Answer:-
3.C] A particle having a mass of 0.5MeV/c2 has a kinetic energy of 100 eV. Calculate the de Broglie wavelength, where c is the velocity of light. Answer:-
