Advertisements
Advertisements
प्रश्न
Give an example to show that light travels faster than sound?
Advertisements
उत्तर
Lightning:
The most common example of showing that light travels faster than sound is lightning. Whenever lightning strikes, you see the lightning first and then hear the thunder after some time.
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
Female voice is shriller than the male voice.
Select the correct alternative :
Wavelength is measured in
You recognize your friend by hearing his voice on a telephone. Explain.
A stone is dropped on the surface of water in a pond. Name the type of waves produced.
What is the difference between a compression and a rarefaction in a sound wave? Illustrate your answer with a sketch.
Explain the terms 'crests' and troughs' of a wave? What type of waves consist of crests and troughs?
An observer A fires a gun and another observer B at a distance 1650 m away from A hears its sound. If the speed of sound is 330 m s-1, find the time when B will hear the sound after firing by A.
A bat emits an ultrasonic sound of frequency 0.25 MHz. Calculate the time in which one vibration is completed.
