Physics for Biologists — DU B.Sc. (Hons) Biological Sciences Previous Year Question Papers

Attempt four questions in all. (a) Write the differences between polar and non-polar dielectrics. (b) Define viscosity and viscous force. (c) The critical angle for a certain material is 45°. What is its polarizing (d) Give the medical significance of dielectric properties in biological materials. (e) Why is spectroscopy important for biology? V) Write a short note on Doppler effect ? P.I.O. Defoe angular momentum and torque. Derive the wol.k energy theorem. Outline the influence of mechanical forces on bone. (a) Derive Gauss's law in the presence of a dielectrics. 6 (c) Deterine the electric susceptibility for a gas whose dielectric constant is 1.000057. (a) With the help of suitable diagram explain the principle, constmction and wol.king of HgrNe gas laser. (6) Evaluate the wavelength of radiation given out by a laser with (" Explain difhaction through ; double slit land compare the pattern with interference. (® Two coherent sources whose intensity ratio is 25 : 1 produce interference fiinges.DeducetheratioOfmaximumintensitytonininumintensity.4 {a) Explain Beer-Lambert Law with example. 5 (" Explain Fluorescence spectroscopy with neat diagram. 7 (c) Write any ffa7iee applications of uv and visible spectrophotometry ? 3