(b) A grating having 5000 lines per cm is used under normal incidence of light. What will happen to the observed spectrum if 90% of the ruled width of the grating is covered? (c) What is the effect on diffraction pattern due to a single slit if: (i) Slit width is decreased. (ii) Wavelength of light is decreased.

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(b) A grating having 5000 lines per cm is used under normal incidence of light. What will happen to
the observed spectrum if 90% of the ruled width of the grating is covered?
(c) What is the effect on diffraction pattern due to a single slit if:
(i) Slit width is decreased.
(ii) Wavelength of light is decreased.
Transcribed Image Text:(b) A grating having 5000 lines per cm is used under normal incidence of light. What will happen to the observed spectrum if 90% of the ruled width of the grating is covered? (c) What is the effect on diffraction pattern due to a single slit if: (i) Slit width is decreased. (ii) Wavelength of light is decreased.
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