Advertisements
Advertisements
Question
Boojho saw a cracker burst at night at a distance from his house. He heard the sound of the cracker a little later after seeing the cracker burst. Give reason for the delay in hearing the sound.
Advertisements
Solution
The light travels faster than sound. So, the light from the cracker reaches faster than that of sound of the cracker.
Speed of light in air = 3 × 108 m/s
Speed of sound in air = 330 m/s
APPEARS IN
RELATED QUESTIONS
Suggest measures to avoid noise pollution in classroom.
Explain in what way noise pollution is harmful to humans.
Write any three ways by which noise pollution affects the human body adversely. List any three steps that should be followed in order to reduce noise pollution.
Noise pollution is a ______ issue.
Complete the table.
| Nature of sound | Unpleasant | Pleasant |
| Speaking | ||
| Whispering | ||
| Aeroplane sounds | ||
| Horns of Vehicles | ||
| Railway Engine | ||
| Rustling of leaves | ||
| Neighing of a horse | ||
| Ticking of a clock |
Short answer type question
Dandiya raas is not allowed after 10.00 pm. Why?
Which of the following may be caused by noise?
Mention a few measures to be taken to reduce the effect of noise pollution.
Suggest three measures to limit noise pollution in your locality.
Name two harmful effects of noise pollution.
