A light is shone through a diffraction grating of slit spacing 4.5x10^5 lines per metre. The incident wavelength is 650nm. Find the angle produced by the incident light and the 2nd order maximum.

In the question you are given the slit spacing of the diffraction grate. To find the fringe spacing of this grate you can use d=1/N where N is the slits per metre. In this question this would be 1/4.5x10^5 = d = 2x10^-6 m. To find the angle provided by the second order maximum, rearrange the equation nλ=dsinθ to make sinθ the subject.This would then become nλ/d = sinθ.To find sinθ, sub in the values given to you in the question; i.e. n=2, λ=650nm and d=2x10^-6 m.This gives sinθ=0.65.Use your calculator to find sin-1(0.65) to find θ=40.5°.

SC
Answered by Sarah C. Physics tutor

4311 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

A car of mass M and a maximum power output of P is on an rough inclined plane Θ to the horizontal. What is the maximum velocity (v). Coefficient of friction=μ and air resistance=kv where k is constant


Why do gravitational fields around point masses obey an inverse square law?


A yacht is sailing through water that is flowing due west at 2m/s. The velocity of the yacht relative to the water is 6m/s due south. The yacht has a resultant velocity of V m/s on a bearing of theta. Find V and theta


An electrical heater supplies 500J of heat energy to a copper cylinder of mass 32.4g Find the increase in temperature of the cylinder. (Specific heat capacity of copper = 385 J*kg^-1*Celsius^-1


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences