Advertisements
Advertisements
प्रश्न
Explain why, the flash of lightning reaches us first and the sound of thunder is heard a little later.
Advertisements
उत्तर
Since light travels faster than sound, the flash of lightning is seen first and the sound of thunder is heard thereafter.
APPEARS IN
संबंधित प्रश्न
An echo returned in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m s−1?
Which property of sound leads of the formation of echoes ?
Name the device which is used to address a small gathering of people.
Fill in the blank with suitable word :
An echo is simply a ................... sound.
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a furnished room
Which of the following device does not work on the multiple reflections of sound waves ?
What is the minimum distance needed for an echo?
State two conditions necessary for hearing an echo.
______ is an image obtained by the use of reflected ultrasonic waves.
Answer the following question in your own words.
What factors are important to get a distinct echo?
