a) Thin films such as soap bubbles show beautiful colors when illuminated by white light. Why? b) "The bright and dark fringes are equally spaced".…
Class 12 Physics · 2083 · Solved Question with Answer
a) Thin films such as soap bubbles show beautiful colors when illuminated by white light. Why?
b) "The bright and dark fringes are equally spaced". Justify this statement from Young's double slits experiment.
c) A diffraction grating has 400 lines per mm and is illuminated normally by monochromatic light of wavelength 600nm. Calculate
i) The grating spacing.
ii) The angle to the normal at which the first order maximum is seen.
iii) The numbers of diffraction maxima obtained.
OR
a) Why is an end correction necessary for organ pipes?
b) How is it possible to estimate that the vessel kept under an open tap of water is about to fill? Justify.
c) In case of an organ pipe, notes of frequencies 200Hz, 600Hz and 1000Hz are heard. Is the pipe open or closed?
d) Describe the various modes of vibration of the air column in a closed organ pipe.