p37_005 - y = D tan θ where D is the distance from the...

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

View Full Document Right Arrow Icon
5. (a) A plane wave is incident on the lens so it is brought to focus in the focal plane of the lens, a distance of 70 cm from the lens. (b) Waves leaving the lens at an angle θ to the forward direction interfere to produce an intensity minimum if a sin θ = ,where a is the slit width, λ is the wavelength, and m is an integer. The distance on the screen from the center of the pattern to the minimum is given by
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: y = D tan θ , where D is the distance from the lens to the screen. For the conditions of this problem, sin θ = mλ a = (1)(590 × 10 − 9 m) . 40 × 10 − 3 m = 1 . 475 × 10 − 3 . This means θ = 1 . 475 × 10 − 3 rad and y = (70 × 10 − 2 m) tan(1 . 475 × 10 − 3 rad) = 1 . 03 × 10 − 3 m....
View Full Document

This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

Ask a homework question - tutors are online