AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

A thunderstorm is heard after the $10 s$ when lightning was seen. Provided that the speed of sound is $340 m / s$ , the approximate distance of the thundercloud from the observer would be__?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

3.1 km

3.2 km

3.3 km

3.4 km

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

The approximate distance of the thundercloud from the observer would be

3.4 km

.
A light wave doesn’t need a medium to travel which is the opposite in the case of sound and this makes light travel faster than sound.
Given,
Time thunder would take to reach the observer,

t = 3 s

and the speed of sound,

v = 340 m s^{- 1}

So, the approximate distance of the thundercloud from the observer,

d = v \times t

⇒

d = 340 \times 10

⇒

d = 3400 m

⇒

d = 3.4 km

As the speed of light (

3 \times 10^{8} m / s

) is much faster than the speed of sound (

340 m s^{- 1}

) therefore, light reaches earlier that sound to an observer during a thunderstorm.

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!