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प्रश्न
What is the general name of the waves consisting of :
(a) compressions and rarefactions?
(b) crests and troughs?
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उत्तर
(a) Longitudinal waves are the general name of compression and rarefaction.
(b) Transverse waves are the general name of crests and troughs.
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संबंधित प्रश्न
Select the correct alternative :
Sound travels the fastest in
Name two sources of sound.
Name the device which is used to produce sound in laboratory experiments?
Which object is vibrating when the following sounds are produced?
(i) The sound of a sitar
(ii) The sound of a tabla
(iii) The sound of a tuning fork
(iv) The buzzing of a bee or mosquito
(v) The sound of a flute
Give reason for the following :
In most of the cases, we cannot see the vibrations of a sound producing object with our eyes.
Describe a simple experiment to show that the prongs of a sound producing tuning fork are vibrating.
Fill in the blank with suitable word.
When the frequency of the sound is increased, the wavelength ____________.
A device called oscillator is used to send waves along a stretched string. The string is 20 cm long, and four complete waves fit along its length when the oscillator vibrates 30 times per second. For the waves on the strings.
(a) what is their wavelength?
(b) what is their frequency
(c) what is their speed?
A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case :
______ is produced when an object is set to vibrate.
