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प्रश्न
State one observation from everyday life which shows that sound travels much more slow than light.
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उत्तर
During rainy season, it is a common observation that the flash of lightning is seen first while the sound of thunder is heard a little later. This is because light (3 × 108 m/s) travels faster than sound (340 m/s) in air.
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संबंधित प्रश्न
Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).
Out of solids, liquids and gases :
(a) in which medium sound travels slowest?
(b) in which medium sound travels fastest?
In which medium sound travels faster : air or hydrogen?
When we open a gas tap of a few seconds, the sound of escaping gas is heard first but the smell of gas comes later. Why?
An electric bell is suspended by thin wires in a glass vessel and set ringing. Describe and explain what happens if the air is gradually pumped out of the glass vessel.
Sound travels in air :
Fill in the blank and explain.
Sound does not travel through ______.
Sound in air propagates in form of
Can we hear sounds of frequencies:
Less than 20 Hz
Do all animals have same ranges of audible frequencies?
