Advertisements
Advertisements
Question
Answer in brief:
In Young's double-slit experiment what will we observe on the screen when white light is incident on the slits but one slit is covered with a red filter and the other with a violet filter? Give reasons for your answer.
Advertisements
Solution
When white light is incident on the slits in Young's double-slit experiment and one of the slits is covered with a red filter, the light passing through this slit appears red. The other slit, which is covered with a violet filter, will produce violet light as emergent light. Interference fringes will be created by combining red and violet colours. If constructive interference occurs for red colour and destructive interference occurs for violet colour, fringes will be red at some points. The middle fringe will be bright, with red and violet colours mixed together.
APPEARS IN
RELATED QUESTIONS
Write the important characteristic features by which the interference can be distinguished from the observed diffraction pattern.
Write the necessary conditions to obtain sustained interference fringes.
State any one difference between interference of light and diffraction of light
How does the angular separation between fringes in single-slit diffraction experiment change when the distance of separation between the slit screens is doubled?
Answer in brief:
Explain what is the optical path length. How is it different from actual path length?
What is meant by coherent sources?
What are the conditions for obtaining a good interference pattern? Give reasons.
Why two light sources must be of equal intensity to obtain a well-defined interference pattern?
What is interference?
Obtain the relation between phase difference and path difference.
Obtain the equation for resultant intensity due to interference of light.
Explain Young’s double-slit experimental setup and obtain the equation for path difference.
Discuss the interference in thin films and obtain the equations for constructive and destructive interference for transmitted and reflected light.
The ratio of maximum and minimum intensities in an interference pattern is 36 : 1. What is the ratio of the amplitudes of the two interfering waves?
In Young's double slit experiment green light is incident on the two slits. The interference pattern is observed on a screen. Which one of the following changes would cause the observed fringes to be more closely spaced?
If the monochromatic source in Young's double slit experiment is white light, then ____________.
The light waves from two independent monochromatic light sources are given by, y1 = 2 sin ωt and y2 = 3 cos ωt. Then the correct statement is ____________.
In Young's experiment, the distance between the slits is doubled and the distance between the slit and screen is reduced to half, then the fringe width ____________.
In a biprism experiment, D = 1 m, `lambda` = 6000 Å. When a convex lens is interposed between the biprism ru1d the eyepiece, then the distance between the images of the slits given by the Jens at two positions are 1.5 mm and 6.0 mm. The fringe width will be ______.
If the two slits in Young's double slit experiment have width ratio 9 : 1, the ratio of maximum to minimum intensity in the interference pattern is ______.
In the Young's double slit experiment, if the phase difference between the two waves interfering at a point is `phi`, the intensity at that point is proportional to ____________.
Waves from two coherent sources of light having an intensity ratio I1 : I2 equal to 'x' interfere. Then in the interference pattern obtained on the screen, the value of (Imax - Imin)/(Imax + Imin) is ______
Two waves with same amplitude and frequency superpose at a point. The ratio of resultant intensities when they arrive in phase to that when they arrive 90° out of phase is ______.
`[cos pi/2=0]`
Show graphically the intensity distribution in a single slit diffraction pattern.
White light is passed through a double slit and interference is observed on a screen 1.5 m away. The separation between the slits is 0.3 mm. The first violet and red fringes are formed 2.0 mm and 3.5 mm away from the central white fringes. The difference in wavelengths of red and violet light is ______ nm.
Two coherent sources P and Q produce interference at point A on the screen where there is a dark band which is formed between 4th bright band and 5th bright band. Wavelength of light used is 6000 Å. The path difference between PA and QA is ______.
The path difference between two interference light waves meeting at a point on the screen is `(87/2)lambda`. The band obtained at that point is ______.
In biprism experiment the maximum intensity is ‘I0’. If the path difference between the two interfering waves is ‘λ/4’ then intensity at the point on the screen is ______.
`[sin 45^circ = cos 45^circ = 1/sqrt 2]`
