Light of wavelength 500 nm illuminates a round 0.50-mm diameter hole.A screen is placed 6.3 m behind the slit.What is the diameter of the central bright area on the screen?

Question

Quizplus · Accepted Answer

The diameter of the central bright area on the screen is given by:$$d = 2.44 \lambda L/D$$where:* d is the diameter of the central bright area* λ is the wavelength of light* L is the distance from the slit to the screen* D is the diameter of the holePlugging in the given values, we get:$$d = 2.44 (500 	imes 10^{-9} 	ext{ m})(6.3 	ext{ m})/(0.50 	imes 10^{-3} 	ext{ m}) = 15 	ext{ mm}$$Therefore, the correct answer is A.

Light of Wavelength 500 Nm Illuminates a Round 0