Advertisements
Advertisements
Question
Light of wavelength of 5000 Å produces diffraction pattern of the single slit of width 2.5 μm. What is the maximum order of diffraction possible?
Solution
Given: λ = 5000 × 10-10 m, d = 2.5 × 10-6 m, N = ?
d sin θ = N n λ
λ = `"d"/"N"`
N = `"d"/lambda`
`= (2.5 xx 10^-6)/(5000 xx 10^-10)`
`= 2.5/(1/2)`
= 5
APPEARS IN
RELATED QUESTIONS
Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are ______.
First diffraction minimum due to a single slit of width 1.0 × 10-5 cm is at 30°. Then wavelength of light used is ______.
Mention the differences between interference and diffraction.
Discuss the special cases on first minimum in Fraunhofer diffraction.
What is Fresnel’s distance? Obtain the equation for Fresnel’s distance.
What is a diffraction grating?
What is resolution?
What is Rayleigh’s criterion?
Discuss the diffraction at a grating and obtain the condition for the mth maximum.
Discuss the experiment to determine the wavelength of monochromatic light using a diffraction grating.
Discuss the experiment to determine the wavelength of different colours using diffraction grating.
Obtain the equation for resolving power of optical instrument
What is the difference between resolution and magnification?
Consider sunlight incident on a slit of width 104 A. The image seen through the slit shall ______.
Consider sunlight incident on a pinhole of width 103A. The image of the pinhole seen on a screen shall be ______.
- a sharp white ring.
- different from a geometrical image.
- a diffused central spot, white in colour.
- diffused coloured region around a sharp central white spot.
