Advertisements
Advertisements
प्रश्न
Define the relation between velocity, wavelength, and frequency of the wave.
State the relation between velocity, frequency, and wavelength.
Advertisements
उत्तर
A wave covers a distance equal to the wavelength (λ) during one period (T).
Therefore, the magnitude of the velocity (v) is given by,
Magnitude of velocity = `"Distance covered"/"Corresponding time"`
v = `lambda/"T"` i.e., v = `lambda xx (1/"T")` ....(1)
But the reciprocal of the period is equal to the frequency (n) of the waves.
∴ `1/"T"` = n ....(2)
From equations (1) and (2), we get
v = nλ
i.e., wave velocity = frequency × wavelength
∴ v = f × λ
संबंधित प्रश्न
Answer briefly.
Define amplitude.
Answer briefly.
Define wavelength of a wave.
Answer briefly.
Draw a wave and indicate points which are
- in phase
- out of phase
- have a phase difference of `pi/2`
Answer briefly.
Explain what is meant by phase of a wave.
State any four properties of progressive wave.
Solve the following problem.
A certain sound wave in air has a speed 340 m/s and wavelength 1.7 m for this wave, calculate
- the frequency
- the period
Solve the following problem.
A tuning fork of frequency 170 Hz produces sound waves of wavelength 2 m. Calculate the speed of sound.
Sound wave A has period 0.015 s, sound wave B has a period of 0.025 s. Which sound has greater frequency?
The ratio of minimum to maximum wavelength in Balmer series is ____________.
The frequency of a tuning fork is 384 per second and velocity of sound in air is 352 m/s. How far the sound has traversed while fork completes 48 vibration?
The wave of the wavelength 30 cm and frequency 100 Hz will be ______.
The following figure shows the shape of part of a long string in which transverse waves are produced by attaching one end of the slring to tuning fork of frequency 300 Hz. The velocity of the waves is ____________.
If velocity of sound in a gas is 360 m/s and the distance between a compression and the nearest rarefaction is 2 m, then the frequency of sound is ____________.
A progressive wave of frequency 50 Hz is travelling with velocity 350 m/s through a medium. The change in phase at a given time interval of 0.01 s is ______.
When the observer moves towards a stationary source with velocity V1, the apparent frequency of emitted note is F1. When observer moves away from the source with velocity V1, the apparent frequency is F2. If V is the velocity of sound in air and `"F"_1/"F"_2=2` then `"V"/"V"_1` is equal to ______.
The displacement-time graphs of two particles A and B are straight lines making angles of 30° and 60° respectively with the time axis. If the velocity of A is vA and that of B is vB, the value of vA/vB is ______.
The wavelength of two waves are 50 and 51 cm respectively. If the temperature of the room is 20°C then what will be the number of beats produced per second by these waves, when the speed of sound at 0°C is 332 m/s?
The width of a slit is 0.012 mm. Monochromatic light is incident on it. The angular position of first bright line is 5.2°. The wavelength of incident light is ______. [sin 5.2° = 0.0906].
In communication system, the process of superimposing a low frequency signal on a high frequency wave is known as ______.
A source of 300 Hz frequency, an observer and a wind are moving as shown in the figure with respect to the ground. The frequency heard by observation is ______.
(Take, the speed of sound in air = 340 m/s)
Two instruments having stretched strings are being played in unison. When the tension of one of the instruments is increased by 1%, 3 beats are produced in 2 s. The initial frequency of vibration of each wire is ______.
Wave of frequency 500 Hz has a phase velocity 360 ms-1. The phase difference between two displacement at a certain point at time 10-3 s apart will be ______.
The energy of photon corresponding to a radiation of wavelength 600 nm is 3.32 × 10−19 J. The energy of a photon corresponding to a wavelength of 400 nm is ______.
