logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
Home  >>  EAMCET  >>  Physics
0 votes

A light ray of wavelength $ \lambda$ is passing through a pin hole of diameter D and the effect is observed on a screen placed at a distance L from the pin hole. The approximations of geometrical optics are applicable if :

\[\begin {array} {1 1} (a)\;D \leq \lambda & \quad (b)\;\frac{L \lambda}{D^2}=1 \\ (c)\;\frac{L \lambda}{D^2} < < 1 & \quad (d)\;\frac{L \lambda}{D^2} > > 1 \end {array}\]

Can you answer this question?
 
 

1 Answer

0 votes
$ (C)\;\frac{L \lambda}{D^2} < < 1$
Hence A is the correct answer.
answered Mar 24, 2014 by meena.p
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...