Physics (AS & A Level) · May / June 2018 · Paper 51 · Question 2
9702
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A student is investigating monochromatic light passing through a diffraction grating. A series of maxima are produced on a screen, as shown in Fig. 2.1. s second order maximum central maximum second order maximum Fig. 2.1 The student measures the distance s between the central maximum and the second order maximum on the screen. The experiment is repeated for different wavelengths of light. It is suggested that s and the wavelength λ are related by the equation s 2 s 2 + D 2 = 4N 2λ2 where D is the distance between the diffraction grating and the screen and N is the number of lines per unit length of the diffraction grating.
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2(a)[1]
2(b)[2]
2(c)(i)[2]
2(c)(ii)[2]
2(c)(iii)[2]
2(c)(iv)[2]
2(d)(i)[3]
2(d)(ii)[1]
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