Advertisements
Advertisements
Question
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a furnished room
Solution
In furnished room, echo is very less. Hence, he can conclude that he was in a furnished room.
APPEARS IN
RELATED QUESTIONS
Does sound follow the same laws of reflection as light does? Explain.
A man is standing at a distance of 12 m from a cliff. Will he be able to hear a clear echo of his sound? Give a reason for your answer.
Which of the following statement best describes frequency?
Fill in the blank with suitable word :
Echoes are caused by the ...................... of sound.
Why do we hear more clearly in a room with curtains than in a room without curtains ?
What is meant by 'reflection of sound' ? What type of surfaces are the best for reflecting sound ?
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a bare room
The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea by the echo method ?
Answer the following question in your own words.
What is an echo?
______ is an image obtained by the use of reflected ultrasonic waves.