Department of Physics Amity Institute of Applied Sciences

Last updated: 6/21/2023

Department of Physics Amity Institute of Applied Sciences Amity University Uttar Pradesh Noida Applied Physics I 5 A diffraction grating is just able to resolve two line of 2 5140 and 5140 85 in the first order Will it resolve the line 8037 20 and 2 8037 50 A in the second order 6 The limits of visible spectrum are approximately 400nm and 700nm Find the angular width of the first order visible spectrum produced by a plane diffraction grating having 15000 lines per inches when the light is incident normally on the grating 7 What is the ratio of resolving powers of two gratings having 15000 lines in 2 cm and 10 000 lines in 1 cm in first order Each grating has lines in its 2 5 cm width 8 How many orders will be visible if the wavelength of incident radiation is 4800 and the number of lines on the grating is 25000 lines per inch 9 Light is incident normally on a grating of total ruled width 5 X 10 m with 2500 lines in all Calculate the angular separation of two sodium lines in the first order spectrum Can they be seen distinctly 10 The wavelengths of sodium D lines are 589 6nm and 589nm What is the minimum number of lines that a grating must have in order to resolve these lines in the first order spectrum 11 a What do you understand by the term resolving power of a grating Explain Rayleigh criterion for the limit of resolution b Two plane diffraction gratings A and B have the same width of ruled surface but on R Which has