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CBSE Class 12-science Answered

Explain diffraction of light due to single slit ,derive secondary Maxima and minima?
Asked by vanshrathod71 | 30 Jan, 2019, 12:38: PM
answered-by-expert Expert Answer
Diffraction is the phenomenon of bending of light around corners of an obstacle in the path of light.
 
Condition: Diffraction of light takes place if the size of the obstacle is comparable to the wavelength of the light. 
 
The condition for secondary maxima is: begin mathsize 12px style asinθ equals nλ over 2 end style
The condition for secondary maxima is: begin mathsize 12px style asinθ equals nλ end style
Where, n = 1, 2, 3, ...
 
In single slit diffraction experiment,
Intensity is proportional to the square of the slit width. Thus, when the width of the slit is made double the original width, intensity will get four times of its original value.

 
 
The intensity distribution curve is shown below.
 
Answered by Science Mate | 31 Jan, 2019, 02:40: PM

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CBSE 12-science - Physics
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Asked by prachis14 | 06 Mar, 2023, 04:49: PM
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CBSE 12-science - Physics
A parallel beam of light of wavelength 600 nm is incident normally on a slit of width 0.2 mm. If the resulting diffraction pattern is observed on a screen 1 m away, find the distance of (i) First minimum, and (ii) Second maximum, from the central maximum. 
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CBSE 12-science - Physics
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Two stars distant two light years are just resolved by a telescope. The diameter of the telescope lens is 0.25 m. If the wavelength of light used in 5000A0, then the minimum distance between the stars is
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CBSE 12-science - Physics
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Asked by ramdasiyogesh2001 | 12 Mar, 2021, 12:47: AM
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CBSE 12-science - Physics
three identical polaroids P1 P2 and P3 are oriented so that passes axis of P2 and P3 are incline at angle of 60° 90° effectively with the passes access a monochromatic source S and police light of intensity I note is kept in front of the proceeds p.m. as shown in figure determine the intensity of light is observed by the observed when polyps P3 is rotated with respect to P2 at angle theta
Asked by dsdeepak487 | 27 Feb, 2020, 06:06: PM
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Two polarizers are placed at crossed position (i.e. having an angle of 90 between them ), a third polarizer making an angle  with the first one is placed between them. An unpolarized light of intensity I0 is incident on the first oneand passes through all the three polarizers. Find the light intensity of the emergent beam.
Asked by Abhineet | 26 Nov, 2019, 02:04: AM
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CBSE 12-science - Physics
A parallel beam of light of wavelength 5900 Å falls normally on a plane transmission grating having 4250 lines/cm. Find the angle of diffraction for maximum intensity in first order.
Asked by Abhineet | 26 Nov, 2019, 02:03: AM
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CBSE 12-science - Physics
Explain diffraction of light due to single slit ,derive secondary Maxima and minima?
Asked by vanshrathod71 | 30 Jan, 2019, 12:38: PM
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CBSE 12-science - Physics
Why does light appear to travel in a straight line in spite of its wave nature?
Asked by Topperlearning User | 13 Jun, 2014, 07:29: AM
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