Advertisements
Advertisements
प्रश्न
Which of the following statement best describes frequency?
विकल्प
the maximum disturbance caused by a wave
the number of complete vibrations per second
the distance between one crest of a wave and the next one
the distance travelled by a wave per second
Advertisements
उत्तर
Frequency is defined as number of complete vibrations per second.
(b) Number of complete vibrations per second.
APPEARS IN
संबंधित प्रश्न
What is meant by an echo?
A man is standing at a distance of 12 m from a cliff. Will he be able to hear a clear echo of his sound? Give a reason for your answer.
Explain why, the flash of lightning reaches us first and the sound of thunder is heard a little later.
Which property of sound leads of the formation of echoes ?
Why do we hear more clearly in a room with curtains than in a room without curtains ?
Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
To hear an echo, the minimum distance of the obstacle from the source of sound must be ______.
______ is an image obtained by the use of reflected ultrasonic waves.
Numerical problems:
An echo returned in 3s. What is the distance of the reflecting surface from the source given that the speed of sound is 330 ms-1?
Answer the following question in your own words.
What factors are important to get a distinct echo?
