11.Find the refractive index of the liquid if a ray of light strikes surface AB normally and then comes out from face AC at grazing emergence.[aμg = 3/2]
12.Define the angular magnification of an optical instrument.
Angular magnification, M is the ratio of the angle subtended at the eye by the images at then near point, to the angle subtended at an unaided eye by the object, at the least distance of distinct vision.
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13.In Young’s double slit experiment, if white light is used in lieu of monochromatic light, what changes are observed in the interference pattern ?
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14.The refractive index of glass with respect to air is 3/2. Find the angle of polarisation.
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15.What is meant by remote sensing ?
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16.An electron is accelerated under a potential difference of 150 volts. What is De broglie’s wavelength ?
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17.How can the work function of tungsten be increased ?
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18.What are Fraunhoffer’s Lines ?
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19.What is the role of control rods in a Nuclear Reactor ?
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