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प्रश्न
Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain?
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उत्तर
We know that the speed of sound is 330 m/s, while the speed of light is 300,000,000 m/s. Thus, we can say that the speed of light will be greater than that of sound. That is, light travels faster than sound. This is why when there is thunder and lightning, the lightning is seen first, and the thunder is heard later.
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संबंधित प्रश्न
Differentiate between Near vision and Distant vision (shape of the eye lens)
Name the following:
The ear ossicle attached to the tympanum.
Where is the Utriculus located? Briefly mention its function.
The diagram alongside represents the structure of the human ear.
(i) Write the names of the parts labelled a to g.
(ii) State briefly the functions of the parts b, d, and g.
(iii) Name the main division of the ear.
(iv) Which is the smallest bone in the human body?
(v) What is labyrinth?
Choose the correct answer.
Labyrinth is a part of ____________
Complete the following sentence with appropriate word :
________ is the organ of balance and hearing in the body.
State the Location:
Semicircular canals
State the functions of the following:
Semi-circular canals
The hearing range of the human ear is ______.
Give reason:
Three small bones of ear ossicles are advantageous as compared to one single bone for hearing.
