Class 11 Exam  >  Class 11 Questions  >  Two coherent sources have intensity ratio of ... Start Learning for Free
Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _
  • a)
     100 : 1
  • b)
    121 : 81
  • c)
    1 : 1
  • d)
    5 : 1
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Two coherent sources have intensity ratio of 100 : 1, and are used for...
I1/I2 = W1/W2 = 100/1 = (a1/a2)2
a1/a2 = 10/1
a1 = 10x
a2 = x
Imax/lmin = (a1+a2/a1-a2)2
(10x+x/10x-x)2
(11x/9x)2
(11/9)2
121/81
View all questions of this test
Most Upvoted Answer
Two coherent sources have intensity ratio of 100 : 1, and are used for...
Interference of Coherent Sources

When two coherent sources are used, the phenomenon of interference is observed. The interference pattern is formed due to the superposition of the waves generated by the two sources.

Intensity Ratio

The intensity of the interference pattern depends on the phase difference between the waves generated by the two sources. The intensity ratio of the two sources is given by the square of the amplitude ratio.

Let the amplitude ratio of the two sources be a:b, then the intensity ratio is given by (a/b)^2.

In this case, the intensity ratio of the two sources is given as 100:1, which means the amplitude ratio is 10:1.

Maximum and Minimum Intensity

When two coherent sources are used for interference, the interference pattern consists of bright and dark fringes. The maximum intensity occurs at the bright fringes, and the minimum intensity occurs at the dark fringes.

Ratio of Maximum and Minimum Intensity

The ratio of maximum and minimum intensity is given by the ratio of the sum and difference of the intensities of the two sources.

Let I1 and I2 be the intensities of the two sources. Then, the maximum intensity is given by (I1 + I2 + 2√I1I2), and the minimum intensity is given by (I1 + I2 - 2√I1I2).

Substituting the intensity ratio (100:1) in the above equations, we get:

Maximum intensity = 121I1/81
Minimum intensity = I1/81

Therefore, the ratio of maximum and minimum intensity is given by:

(121I1/81)/(I1/81) = 121:1

Hence, the correct option is (b) 121:81.
Free Test
Community Answer
Two coherent sources have intensity ratio of 100 : 1, and are used for...
I1/I2=W1/W2=100/1=(a1/a2)2

a1/a2=10/1
a1=10x
a2=x
Imax/lmin=(a1+a2/a1-a2)2
(10x+x/10x-x)2
(11x/9x)2
(11/9)2
121/81... ans
Attention Class 11 Students!
To make sure you are not studying endlessly, EduRev has designed Class 11 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 11.
Explore Courses for Class 11 exam

Top Courses for Class 11

Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer?
Question Description
Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer?.
Solutions for Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11. Download more important topics, notes, lectures and mock test series for Class 11 Exam by signing up for free.
Here you can find the meaning of Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Two coherent sources have intensity ratio of 100 : 1, and are used for obtaining the phenomenon of interference. Then the ratio of maximum and minimum intensity will be _a)100 : 1b)121 : 81c)1 : 1d)5 : 1Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 11 tests.
Explore Courses for Class 11 exam

Top Courses for Class 11

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev