J Chegg study I Guided Sc x a The Expert TAI Human x C Secure /common/TakeTu alA
ID: 1608714 • Letter: J
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J Chegg study I Guided Sc x a The Expert TAI Human x C Secure /common/TakeTu alAssignment aspx Homework 13 Begin Date: 4/7/2017 10:00:00 AM Due Date: 4/21/2017 11:59:00 PM End Date: 4/22/2017 59:00 PM (10%) Problem 7: Light of wavelength 675 nm in air enters a glass prism. The index of refraction of air is ma and the index of refraction of glass is ng. Randomized Variables 675 nm Assignment Status Click here for A 33% Part (a) Express e wavelength of the light in erms of ma, and n e glass detailed view Grade Summary Deductions Potential 100% Problem Status 7 8 9 Submissions Attempts remaining: N 4 5 6 0% per attempt) 2 3 detailed view HACKSPACH HAR Submit Hints: Feedback: 5% deduction per feedback. 10 A 33% Part (b) Express the velocity of light in the glass, ve, n terms of the speed of light in air va, and the indices na and n A 33% Part (c) Calculate va, in meters per second. assuming n 1 and ng 1.75 Expert TA. LLC 6:34 PMExplanation / Answer
a) when light travels from one medium to other medium, its frequency remains same.
fg = fa
vg/lamda_g = va/lamda_a
(c/ng)/lamda_g = (c/na)/lamda_a
1/(ng*lamda_g) = 1/(na*lamda_a)
==> lamda_g = lamda_a*(na/ng) <<<<<<<<<<<-------------Answer
b) when light travels from one medium to other medium, its frequency remains same.
fg = fa
vg/lamda_g = va/lamda_a
vg = va*(lamda_g/lamda_a)
= va*(na/ng) <<<<<<<<<<<-------------Answer
c) vg = va*(na/ng)
= 3*10^8*(1/1.75)
= 1.71*10^8 m/s <<<<<<<<<<<-------------Answer
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