In a two siiI interference experiment, the slits are 0.20mm apart, and the scree

Question

In a two siiI interference experiment, the slits are 0.20mm apart, and the screen is at a distance of 1 m. The third bright fringe (not counting the central bright fringe straight ahead of the slits) is found to be displaced 7.5mm from the central fringe. Find the wavelength of the light used. 200nm 300nm 400nm 500nm In the previous problem, what is the frequency of the light beam 6 astir l0^10 hz 6 astir 10^12 hz 6 astir l0^14 hz 6 astir 10^18 hz In the previous problem, what is the energy of the h** beam you found 4 astir 10^10 J 4 astir 10^21 J 4 astir 10^24 J 4 astir 10^31 J

Explanation / Answer

ANSWER

Given,

d = 0.20 mm

L = 1.00 m

m = 3

y = 7.50 mm

Part a) Find ,

y = mL/d

= yd/(mL) = (0.0075m)(0.0002m)/(3)(1m) = 5.00*10-7 m

= 500 nm   (Option d)

Part b) Find f,

f = c/ = (3x108 m/s) / (5x10-7 m)

f = 6x1014 Hz   (Option c)

Part c) Find E,

E = hf = (6.626x10-34 J.s)(6x1014 1/s)

E = 3.97x10-19 J

E = 4x10-19 J   (Option a)

Regards!!!

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