Please help with this problem, need it urgently, thanks so much. A green laser (
ID: 1417532 • Letter: P
Question
Please help with this problem, need it urgently, thanks so much.
A green laser (lambda = 501 nm) creates the horizontal diffraction pattern shown when it passes through a single slit (a = 4.50 mu m). What is the orientation of the slit? vertical horizontal There's no way to know. You can see from the intensity graph that the first minima occur around plusminus 22 cm. Suppose that in your experiment, you needed the the first minima to occur around plusminus 30 cm. Select all the options that could make this adjustment happen. Somehow make the slit narrower. Somehow make the slit wider. Decrease the distance from the slit to the viewing screen. Increase the distance from the slit to the viewing screen. Somehow decrease the wavelength of the light. Somehow increase the wavelength of the light. Change the orientation of the slit. Given that the first minima do occur at plusminus 22.0 cm, determine the distance from the slit to the viewing screen. (Answer in meters.)Explanation / Answer
A) Vertical
The relation between the slit width a and the angular width d(theta) on the screen is d(theta) = Lambda/a . When a is large, d(theta) is small and vice-versa. Along the horizontal direction on the screen, d(theta) is large, so a along the horizontal direction must be small.
B) Slit Narrower, Wavelength increase, increase distance from slit to screen
C) Distance = L = y*a/Lambda = 0.22*4.5*10^-6/501*10^-9 = 1.98 m