+91-8076753736[email protected]
logo
logo
-->

Wave Optics

Question
CBSEENPH12039802
Wired Faculty App

In a double slit experiment, the two slits are 1 mm apart and the screen is placed in 1 m away. A monochromatic light of wavelength 500nm is used. What will be the width of each slit for obtaining ten maxima of double slit within the central maxima of double slit within the central maxima of single slit pattern?

  • 0.2mm

  • 0.1 mm

  • 0.5 mm

  • 0.02 mm

Solution

A.

0.2mm

Given d =1 mm = 1 x 10-3 m
D =1m
straight lambda space equals space 500 nm space equals space 5 space straight x space 10 to the power of negative 7 end exponent space straight m As space width space of space central space maxima space equals space width space of space 10 space maxima therefore space fraction numerator 2 Dλ over denominator straight a end fraction space equals space 10 open parentheses λD over straight d close parentheses rightwards double arrow space straight a space equals space straight d over 5 space equals space 10 to the power of negative 3 end exponent over 5 space equals space 0.2 space straight x space 10 to the power of negative 3 end exponent straight m straight a space equals space 0.2 space mm

Some More Questions From Wave Optics Chapter

What is the shape of the wavefront in each of the following cases:
 Light emerging out of a convex lens when a point source is placed at its focus.

What is the shape of the wavefront in each of the following cases:
The portion of the wavefront of light from a distant star intercepted by the Earth. 

Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation