Created by StemPy LabA thin prism of angle , made of glass of refractive index , is combined with a second thin prism made of glass of refractive index . The second prism is placed the other way round, so that the combination produces no deviation of the light (for the colour these indices refer to). The angle of the second prism, in degrees, is ____.
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← Two resistors of 400 Ω each are connected in series across an ideal battery of 84 V. A voltmeter whose own resistance is 400 Ω is connected across one of the resistors. The reading of the voltmeter, in volts, is ____.A proton is accelerated from rest through a potential difference of 1 V. An electron is accelerated from rest through a potential difference V, chosen so that it has the same de Broglie wavelength as the proton. The mass of a proton is 1836 times the mass of an electron. Ignoring relativity, the value of V, in volts, is ____. →
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