1078_Physics ProblemsTechnical Physics

1078_Physics ProblemsTechnical Physics - Chapter 38 P38.33...

This preview shows page 1. Sign up to view the full content.

Chapter 38 419 P38.33 d = × = 100 10 250 400 10 4000 3 6 . . mmm lines mm m n m dm m d sin sin θλ θ λ =⇒ = (a) The number of times a complete order is seen is the same as the number of orders in which the long wavelength limit is visible. m d max max sin sin . . == ° = 900 700 571 nm nm bg or 5 orders is the maximum . (b) The highest order in which the violet end of the spectrum can be seen is: m d max max sin sin . . ° = 400 10 0 nm nm or 10 orders in the short-wavelength region . *P38.34 (a) The several narrow parallel slits make a diffraction grating. The zeroth- and first- order maxima are separated according to d sin = 1 af sin . × × d 632 8 10 9 3 m 1.2 10 m sin . . 1 0 000 527 0 000 527 rad yL = tan . . . 140 0000527 0738 m m . FIG. P38.34 (b) Many equally spaced transparent lines appear on the film. It is itself a diffraction grating. When the same light is sent through the film, it produces interference maxima separated according to d sin = 1 sin . . × × = d 632 8 10 0000857 9 3 m 0.738 10 m = tan . . . 120 m m a f An image of the original set of slits appears on the screen. If the screen is removed, light
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Ask a homework question - tutors are online