| ⇦ | 
| ⇨ |
The periodic waves of intensities I₁ and I₂ pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is:
Options
(a) I₁ + I₂
(b) (√I₁ + √I₂)²
(c) (√I₁ – √I₂)²
(d) 2 (I₁ + I₂)
Correct Answer:
2 (I₁ + I₂)
Explanation:
The resultant intensity of two periodic waves at a point is given by
I = I₁ + I₂ + 2 √I₁I₂ . cos ?.
Resultant intensity is max. if cos ? = -1
i.e Iₘₐₓ = I₁ + I₂ + 2 √I₁I₂
Resultant intensity is min. if cos ? = +1
i.e, Iₘᵢₙ = I₁ + I₂ – 2 √I₁I₂
Therefore, the sum of the max. and min. intensities is Iₘₐₓ + Iₘᵢₙ
= I₁ + I₂ + 2 √I₁I₂ + I₁ + I₂ – 2 √I₁I₂
= 2 (I₁ + I₂)
Related Questions: - In atom bomb, the reaction which occurs is
- The radius of a ball is(5.2±0.2)cm.The percentage error in the volume of the ball
- A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
- At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
- A plumb line is suspended form a ceiling of a car moving with horizontal acceleration
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In atom bomb, the reaction which occurs is
- The radius of a ball is(5.2±0.2)cm.The percentage error in the volume of the ball
- A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
- At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
- A plumb line is suspended form a ceiling of a car moving with horizontal acceleration
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply