Advertisements
Advertisements
प्रश्न
A type of electromagnetic wave has a wavelength of 50 Å. Name the wave and state one use of this type of wave.
Advertisements
उत्तर
X-rays. These are used for determining fracture of bones, hidden objects in customs at Airports.
संबंधित प्रश्न
Why are the ceilings of concert halls curved?
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
The following diagram shows three ways in which the string of an instrument can vibrate.
(a) which of the diagram shows the principal note?
(b) which has the frequency four times that of the first?
(c) what is the ratio of the frequency of the vibration in (i) and (ii)?
What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.
Define the term Frequency (as applied to sound waves)
What are infrasonic waves?
Write the approximate value of the speed of sound in air.
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
