Question

The Wavelength Of A Spectral Line Of Caesium Is 460 Nm Calculate The Frequency Of The Line

Answer 1

The wavelength of a spectral line of caesium is 460 nm calculate the frequency of the line...

do you know about line spectra or spectral line ?

when electrons move from higher energy level to lower energy level, photons are emitted and wavelength of emitted photons can be seen in the spectral line.

we know, photons are moving with speed of light in vaccum.

it means, when the wavelength of a spectral line of Cesium is 460nm.

then, frequency of the line can be given by, speed of light in vaccum/wavelength of spectral line of Cesium.

here, speed of light in vaccum = 3 × 10^8 m/s and wavelength of spectral line of Cesium = 460nm = 460 × 10^-9

so, frequency = 3 × 10^8/(460 × 10^-9)

= 0.006521 × 10^17 Hz

= 6.521 × 10¹⁴ Hz.

Answer 2

Answer:

The Frequency Of The Line is 6.52×1014 s−1

Explanation:

There are various types of wave, like radio wave, light wave, through space they travel. They have different characteristics like shape , length etc. The distance between one peak to another peak is known as wavelength of that wave.

According to the problem  The Wavelength Of A Spectral Line Of Caesium Is 460 Nm.

Then to find the frequency of the line we have used the formula,

c = νλ

where c = speed of light = 3×108 m/s

ν = frequency of light

λ= wavelength = 460 nm = 460 ×10−9 m

putting all the values in the equation,

ν=c/λ          

=3×108m/s/460 ×10−9 m          

 =6.52×1014 s−1

Hence The Frequency Of The Line is 6.52×1014 s−1