Explain why there is usually a time delay between observing a flash and hearing a thunder?
(N/A) The speed of light in air is approximately $3 \times 10^8 \text{ m/s}$, whereas the speed of sound in air is approximately $343 \text{ m/s}$ at room temperature.
Because the velocity of light is significantly greater than the velocity of sound, the light from the lightning flash reaches the observer almost instantaneously.
In contrast, the sound waves produced by the thunder travel much slower, resulting in a noticeable time delay between seeing the flash and hearing the thunder.
Because the velocity of light is significantly greater than the velocity of sound, the light from the lightning flash reaches the observer almost instantaneously.
In contrast, the sound waves produced by the thunder travel much slower, resulting in a noticeable time delay between seeing the flash and hearing the thunder.
Explore More
Similar Questions
What do you understand by the term infrasonic vibrations?
Easy
View SolutionIf the density of a medium through which sound is propagating is minimum,then this point is called:
Easy
View Solution$(a)$ The sound of an explosion on the surface of a lake is heard by a boatman $100 \ m$ away and a diver $100 \ m$ below the point of explosion. Of the two persons mentioned (boatman or diver),who would hear the sound first and why?
$(b)$ Calculate the wavelength of a sound wave whose frequency is $220 \ Hz$ and speed is $440 \ m \ s^{-1}$ in a given medium.
$(b)$ Calculate the wavelength of a sound wave whose frequency is $220 \ Hz$ and speed is $440 \ m \ s^{-1}$ in a given medium.
Medium
View SolutionWhat is an echo? When can we distinctly hear the echo of a sharp sound? Why cannot we hear an echo in small halls?
Medium
View SolutionWill the sound be audible if a string is set into vibration on the surface of the moon? Give a reason for your answer.
Easy
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo