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प्रश्न
For hearing the loudest ticking sound heard by the ear, find the angle x in Fig.12.4.
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उत्तर
For hearing the loudest ticking sound, the angle made by incident sound with normal = angle made by reflected sound wave with normal = x
Now, the angle made by incident sound with normal
= 90° – 50°
= 40°
∴ x = 40°
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संबंधित प्रश्न
What is the audible range of the average human ear?
Name the organs of hearing in our body.
Can we hear (a) infrasonic waves (b) ultrasonic waves ?
What name is given to the sound waves of frequency too high for humans to hear ?
Choose the infrasonic waves and ultrasonic waves from the following frequencies :
(i) 10,000 Hz
(ii) 30,000 Hz
(iii) 18 Hz
(iv) 50,000 Hz
(v) 10 Hz
What is ultrasound ? What is the difference between ordinary sound and ultrasound ?
What are infrasonic waves ? Name two animals which produce infrasonic waves.
What are ultrasonic waves ? Name two animals which can produce ultrasonic waves.
One of the following can hear infrasound. This one is :
A girl is sitting in the middle of a park of dimension 12 m × 12 m. On the left side of it, there is a building adjoining the park and on the right side of the park, there is a road adjoining the park. A sound is produced on the road by a cracker. Is it possible for the girl to hear the echo of this sound? Explain your answer.
