# Wavelength

## Trending Questions

**Q.**

How are wavelength and frequency related to speed of

soundwaves

**Q.**A tuning fork vibrates with a frequency of 256hz if the speed of sound is 345.6m/s find the wave length during the time the fork makes 60 vibrations

**Q.**The distance between a crest and an adjacent trough is

- λ
- λ2
- 2λ
- 3λ2

**Q.**

Question 10

The given graph shows the displacement versus time relation for a disturbance travelling with velocity of 1500 ms−1 . Calculate the wavelength of the disturbance

**Q.**

**Calculate the time taken by the sound wave to travel 1.5 km when the frequency and wavelength are 2000 Hz and 0.35 m respectively.**

**Q.**We see the lightning flash before we can hear thunder because ___.

- light travels faster than sound
- sound travels faster than light
- the sound of lightning is generated only after the lightning flashes
- sound wave is a transverse wave

**Q.**The wave length of wave is1500m and it's frequency is 200khz . calculate the speed of this wave.

**Q.**A sound wave has a wavelength of 3 m. The distance from a compression centre to the adjacent rarefaction centre is?

- 0.75 m
- 1.5 m
- 3.0 m
- 6.0 m

**Q.**

Draw the sketches of two waves A and B such that wave A has twice the wavelength and half the amplitude of wave B.

**Q.**A sound wave has frequency of 2 kHz and wavelength 30 cm. It will travel a distance of 1.8 km in

- 0.3 s
- 3 s
- 0.03 s
- 12 s

**Q.**

Name the waves that are produced in the string of a guitar.

**Q.**

A wave is moving in air with a velocity of 340 m/s. Calculate the wavelength if its frequency is 512 vibrations / sec.

**Q.**

The wavelength of the sound produced by a tuning fork of frequency 450 Hz which is set to vibrate in air (take velocity of sound in air as 320 m/s) is

144 cm

7.1 cm

0.711 m

0.07 m

**Q.**What are the amplitude and wavelength of the wave shown in the figure given below?

- 1 cm, 1609 cm
- 0.5 cm, 1409 cm
- 05 cm, 1609 cm
- 1 cm, 1409 cm

**Q.**

What do you understand by loudness of sound?

**Q.**

Since sound waves can travel through air, and air can transmit only transverse waves, it follows that sound travels as transverse

waves.

- True
- False

**Q.**

The wavelength of sound is 1.7×10−2m .Calculate the frequency of sound.(velocity of sound is v=343.3 m/s)

**Q.**The displacement-time graph of a sound wave is given below. If the speed of the sound wave is 300 ms–1 in a given medium, then the wavelength of the sound wave is

- 12 m
- 2 m
- 3 m
- 23 m

**Q.**

The number of waves contained in a unit length of a medium is called

elastic

wave number

wave pulse

electromagnetic wave

**Q.**A series of ocean waves, each 5.0 m from crest to crest, move past the observer at a rate of 2 waves per second. The velocity of the ocean wave is

- 2.5 m/s
- 5.0 m/s
- 8.0 m/s
- 10.0 m/s

**Q.**If the wind blows in the direction of sound then the Speed of sound becomes:

(v = final speed of sound; Vs = speed of sound; Vw = speed of wind)

- v=Vs–Vw
- v=2Vs–Vw
- v=Vs+Vw
- v=Vs–2Vw

**Q.**

Calculate the wavelength of a sound wave whose frequency is $220\mathrm{Hz}$ and speed is $440\mathrm{m}/\mathrm{s}$ in a given medium.

**Q.**

If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then λ for this wave in cm will be :

(a) 2

(b) 0.2

(c) 20

(d) 200

**Q.**A sound wave of wavelength 0.332 m has a time period of 1/1000 s. If the time period is decreased to 1/10000 s, calculate the wavelength

**Q.**

The musical notes produced by an instrument are of frequencies $256Hz$ and $384Hz$ respectively. Compare their wavelengths. Given that speed of sound in air is $344m/s$.

**Q.**For the given wave, λ2 is represented by

- CD
- AD
- BD
- AE

**Q.**

The longitudinal waves travel in a coiled spring at a rate of 4 m/s. The distance between two consecutive compressions is 20 cm. Find :

(i) Wavelength of the wave

(ii) Frequency of the wave

**Q.**

The time period of a wave is $5\times {10}^{-3}$second and the wavelength is 50 cm. Calculate the frequency and speed of the wave.

**Q.**How many vibration will a running fork of frequency 280hz will complete during the time sound travel formed in air by 20m. Take speed of sound in air as 340m/s

**Q.**

The S.I. unit of wavelength is ___.

decibel

second

metre

metre per second