CBSE Class 12 Sample Paper for 2022 Boards [Term 2] - Physics

Question 11 (Choice 2) - (a) - CBSE Class 12 Sample Paper for 2022 Boards [Term 2] - Physics - Solutions to CBSE Sample Paper - Physics Class 12

Last updated at March 29, 2022 by Teachoo

(a) "If the slits in Young's double slit experiment are identical, then intensity at any point on the screen may vary between zero and four times to the intensity due to single slit". Justify the above statement through a relevant mathematical expression.

Answer

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Question 11 (Choice 2) (a)
If the slits in Young's double slit experiment are identical, then intensity at any point on the screen may vary between zero and four times to the intensity due to single slit". Justify the above statement through a relevant mathematical expression.
The total intensity at point where the point where the phase difference is ∅, is given by 𝐼 = 𝐼_1+𝐼_2+2√(𝐼_1 𝐼_2 ) cos"∅" . Here 𝐼_1 and 𝐼_2 are the intensities of two individual sources which are equal.
When ∅ is 0, 𝐼=〖4𝐼〗_1
When ∅ is 90°, 𝐼=0
Thus intensity on the screen varies between 〖4𝐼〗_1 and 0.

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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