p37_015 - D is the separation of the headlights then D =...

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

View Full Document Right Arrow Icon
15. (a) We use the Rayleigh criteria. Thus, the angular separation (in radians) of the sources must be at least θ R =1 . 22 λ/d ,where λ is the wavelength and d is the diameter of the aperture. For the headlights of this problem, θ R = 1 . 22(550 × 10 9 m) 5 . 0 × 10 3 m =1 . 34 × 10 4 rad . (b) If L is the distance from the headlights to the eye when the headlights are just resolvable and
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: D is the separation of the headlights, then D = Lθ R , where the small angle approximation is made. This is valid for θ R in radians. Thus, L = D θ R = 1 . 4 m 1 . 34 × 10 − 4 rad = 1 . × 10 4 m = 10 km ....
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