Go Back   Physics Help Forum > High School and Pre-University Physics Help > Light and Optics

Light and Optics Light and Optics Physics Help Forum

Reply
 
LinkBack Thread Tools Display Modes
Old Jun 11th 2009, 08:21 PM   #1
sam
Junior Member
 
Join Date: Jun 2009
Posts: 5
I have my exam soon so help asap would be appreciated!

Hi, I am having trouble with this question. I'm not really sure what formula to use and how i would find the degrees. Any help would be appreciated!
For a slit width 3.0 x 10^-6 m, illuminated by light of wavelength 550nm, find the width of the central maximum, in degrees.
sam is offline   Reply With Quote
Old Jun 12th 2009, 09:26 PM   #2
Senior Member
 
Join Date: Apr 2008
Location: HK
Posts: 886
You should use $\displaystyle a sin\theta = m\lambda$
a is the separation of the slit width,
$\displaystyle \theta$ refers to the angle of the m th minima measured from the centre of the slit,
m is the order of minima,
$\displaystyle \lambda$ is the wavelength

So you put 1 into the equation and you find $\displaystyle \theta$
since it only includes half of the central maximum, so central maximum should have $\displaystyle 2\theta$
werehk is offline   Reply With Quote
Old Jun 14th 2009, 05:37 PM   #3
sam
Junior Member
 
Join Date: Jun 2009
Posts: 5
Thank you so much for the help!
sam is offline   Reply With Quote
Reply

  Physics Help Forum > High School and Pre-University Physics Help > Light and Optics

Tags
appreciated, asap, exam



Thread Tools
Display Modes


Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
momentum questions plz help asap desire Kinematics and Dynamics 1 Mar 26th 2015 08:27 AM
Any help is appreciated!!! Fizzle Kinematics and Dynamics 20 Jun 12th 2014 04:42 AM
Below or above the horizontal! help asap Track.kid15 Kinematics and Dynamics 2 Nov 19th 2010 07:11 AM
Dynamics help needed asap dank420 Kinematics and Dynamics 3 Sep 2nd 2010 06:40 AM
I dont understand this question about total combined momentum..help appreciated? kiwisurf Energy and Work 6 Jul 9th 2009 10:10 PM


Facebook Twitter Google+ RSS Feed