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Why are concave reflectors used in big a...

Why are concave reflectors used in big auditoria ?

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Concave reflectors are used in big auditoria to distribute the sound evenly in all directions. When the speaker is placed at the focus of the concave reflector, then the reflected sound waves travel parallel, in all directions and can be distributed evenly.
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PEARSON IIT JEE FOUNDATION-SOUND-CONCEPT APPLICATION (LEVEL-2)
  1. Three persons P(1), P(2), and P(3) are at three different points A, B ...

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  2. A man is standing not exactly at the exactly at the centre, in between...

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  3. If the same time taken for the reflected sound to reach the sonar os 2...

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  4. Which of the following statements is correct?

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  5. The direction of an incident sound wave makes an angle of 30^(@) with ...

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  6. The frequency of a tuning fork is 600 Hz. What is the number of vibrat...

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  7. Sandeep constructed a simple pendulum to find the value of 'g' at that...

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  8. Chanukya was eager to know the time taken by sound to travel the same ...

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  9. The velocity of sound in air, in water and in a given solid is, 330 ms...

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  10. Dinesh, who is fond of music, vibrates a glass with a spoon. If he fil...

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  11. A sound wave is travelling from a metallic rod to water. What changes ...

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  12. Two astronauts who land on the moon cannot talk with each other. What ...

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  13. The time period of a simple pendulum is given by the formula, T = 2pi ...

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  14. A police targets a thief, who is at rest at point Q. He fires a bullet...

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  15. Draw a labelled diagram to show the multiple reflections of sound in a...

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  16. The flash of lightning, produced at a distance of 10 km above the grou...

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  17. Why is the voice of children more shrill than that of adults'? Explain...

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  18. A ship at rest is sending ultrasonic sound waves to detect a shoal of ...

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  19. Why are the walls, roof, seats and steps, of a cinema theatre or audit...

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  20. Why are concave reflectors used in big auditoria ?

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