Physics: Ch 19 HW 84784446 Itern 2 previous | 2 of 20 next Item 2 Part A A ray o
ID: 1659652 • Letter: P
Question
Physics: Ch 19 HW 84784446 Itern 2 previous | 2 of 20 next Item 2 Part A A ray of white light strikes the surface of a 4.0-cm-thick slab of flint glass as shown in the figure. As the ray Estimate how far apart the rays of deepest red and deepest violet light are as they exit the bottom surface. Assume iged -1.57 and yiaolet 1.60 Express your answer using two significant figures Figure 1of 1 Az+1.3 Give 60 / Incorrect; Try Again 4.0 cm Part B Which exiting ray is closer to point P? red light violet lightExplanation / Answer
By snells law,
Angle of refraction of red light is given by
sin r1 = n1 sin 60 degree
r1= arcsin (sin 60 degree /n1)
= arcsin ( 0.866/1.57)
= 33.477 degree
Angle ot refraction of violet light r2 = arcsin(0.866/1.60)
r2 = 32.77 degree
Required distance = lateral shift of violet- lateral shift of red
= t sec r2 * sin (i-r2) - t sec r1 * sin (i-r1)
= 40* sec 32. 77 degree * sin (60 degree - 32.77 degree) - 40*sec 33.477 degree * sin (60 degree - 33.477 degree)
= 21.7667 - 21.4148 mm
= 0.35 mm answer