(a) Light of wavelength 540 nm falls on a single slit of width 0.15mm. On a scre
ID: 1677411 • Letter: #
Question
(a) Light of wavelength 540 nm falls on a single slit of width 0.15mm. On a screen a distance of 8 m away
what is the width of the central bright fringe?
(b) When light of wavelength passes through as a diffractiongrating the highest order bright fringe that is
seen is m=7. What does this imply about the slit spacing, d, in thegrating?
(c) A slide projector is used to project a 35 mm wide slide to filla 1.4 m wide screen. If the projector uses a
converging lens with a 10 cm focal length, then relative to thelens where must the slide and screen be placed?
(d) Unpolarized light of intensity 1000W/m2 passes through 2polarizing filters. The first has an axis that is 40°
from vertical and the second is 70° from vertical. What is theintensity of the light between the filters and after
the second filter?
The answers should be (a) 5.76 cm (b) 7 l < d < 8 l
(c) s = 10.25 cm (slide position), s£ = 410 cm (screenposition)
(d) 500 W/
m2 (between), 375 W/
m2 (after second).
Can someone show me how to get these? Will rate LIFESAVER!
Explanation / Answer
Help please.
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