White light may be considered to be mixture of waves of `lambda` ranging between `3900 Å` and `7800 Å`. An oil film of thickness `10,000 Å` is examined normally by the reflected light. If `mu=1.4`, then the film appears bright forA. 4308Å=1.4, 5091Å,6222ÅB. 4000Å,5091Å,5600ÅC. 4667Å,6222Å,7000ÅD. 4000Å,4667Å,5600Å,7000Å

White light may be considered to be mixture of waves of `lambda` rangi

1.	White light may be considered to be mixture of waves of `lambda` ranging between `3900 Å` and `7800 Å`. An oil film of thickness `10,000 Å` is examined normally by the reflected light. If `mu=1.4`, then the film appears bright forA. 4308Å=1.4, 5091Å,6222ÅB. 4000Å,5091Å,5600ÅC. 4667Å,6222Å,7000ÅD. 4000Å,4667Å,5600Å,7000Å
Answer» Correct Answer - A

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Angular width of central maxima in the Fraunhofer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength `6000Å`. When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will beA. `3500 Å`B. `4200 Å`C. `4700 Å`D. `6000 Å`
Find the half angular width of the central bright maximum in the fraunhofer diffraction pattern of a slit of width `12xx10^(-5)cm` when the slit is illuminated by monochromatic light of wavelength 6000 Å.
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Light wavelength 6000 Å is incident normally on a slit of width `24xx10^(-5)` cm. find out the angular position of seconds minimum from central maximum?

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