Home
Class 9
PHYSICS
We see flash earlier than the thunder. D...

We see flash earlier than the thunder. Discuss.

Text Solution

Verified by Experts

Flash (light) travels with a speed of `3 xx 10^8 m//s` whereas thunder (sound) travels with a speed of `340 m//s`.
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

The flash of lightening is seen much before we hear the thunder because

Why do we see lighting before we hear the thunder ?

(a) What is the function of pinna ? (b) You observe that the delay between a lighting flash and the thunder is 8 s . How far away is the lightning ?

In bisexual flowers when the gynoecium matures earlier than the androecium, it is called

Answer the following question giving explanations wherever necessary. Lightning 'and thunder take place in sky and at tlie same distance from us. Explain why-lightning is seen earlier and thunder is heard later.

Assertion: The flash of lightening is sees before the sound of thunder is heard. Reason: Speed of sound is greater than speed of light.

Knowledge Check

  • We hear a thunder because

    A
    A lot of charge goes in lightning
    B
    The air heats up and expands all of a sudden
    C
    Clouds bang against each other
    D
    Cloud burst

  • The flash of lightening is seen much before we hear the thunder because

    A
    the speed of light is more than the speed of sound.
    B
    the speed of sound is more than the speed of light.
    C
    the speed of light is equal to the speed of sound.
    D
    the speed of sound is more in vacuum than in air.

  • The flash of lightening is seen much before we hear the thunder because

    A
    the speed of light is more than the speed of sound.
    B
    the speed of sound is more than the speed of light.
    C
    the speed of light is equal to the speed of sound.
    D
    the speed of sound is more in vacuum than in air.