Advertisements
Advertisements
प्रश्न
Give two practical applications of reflection of sound waves.
Advertisements
उत्तर
- Megaphones or loudhailers, horns: Musical instruments such as trumpets and shehnai are all designed to send sound in a particular direction without spreading it in all directions.
- Stethoscope: A stethoscope is a medical instrument for listening to sounds produced within the body, mainly in the heart or lungs. In stethoscopes, the sound of the patient’s heartbeat reaches the doctor’s ears through multiple reflections of sound.
संबंधित प्रश्न
Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.
A wave is moving in air with a velocity of 340 m/s. Calculate the wavelength if its frequency is 512 vibrations/sec.
Name the unit used to measure the loudness of sound. Also write its symbol.
Name the characteristic which helps us distinguish between a man's voice and a woman's voice, even without seeing them.
What type of scans are used these days to monitor the growth of developing baby in the uterus of the mother ?
Fill in the blank with suitable word :
Loudness of sound depends on .....................
What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?
Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.
What type of waves are generated by SONAR device fixed to a fishing ship ?
The depth of an ocean can be determined by ______.
