Advertisements
Advertisements
प्रश्न
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
उत्तर
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
संबंधित प्रश्न
Suggest measures to avoid noise pollution in classroom.
What do you do in the following situations:
Exposed to a series of firecrackers with high sound level.
What is the safe limit of sound level in dB for our ears?
Write the answer in your own words.
What is meant by noise pollution?
Name one source of sound causing noise pollution.
Write about the sources of noise pollution. Give the impact of noise pollution on the human body.
Short answer type question
Dandiya raas is not allowed after 10.00 pm. Why?
Noise is produced by
What is the name of the sound produced by irregular vibrations?
People routinely working in noisy places are not much affected by noise.
