mention one use of part of electromagnetic spectrum to which the wavelength of 21 cm (emitted by hydrogen in interstellar space belongs

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Solution

Dear Student,

Radio waves have wavelengths of 1mm to 100km. Hence, 21cm lies at short wavelength end of radio waves.
So we use this part of electromagnetic spectrum in radio transmissions.

Regards

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Similar questions

Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs.

(a) 21 cm (wavelength emitted by atomic hydrogen in interstellar space).

(b) 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift).

(c) 2.7 K [temperature associated with the isotropic radiation filling all space-thought to be a relic of the ‘big-bang’ origin of the universe].

(d) 5890 Å - 5896 Å [double lines of sodium]

(e) 14.4 keV [energy of a particular transition in ⁵⁷Fe nucleus associated with a famous high resolution spectroscopic method

(Mössbauer spectroscopy)].

Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs.

(a) 21 cm (wavelength emitted by atomic hydrogen in interstellar space).

(b) 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift).

(c) 2.7 K [temperature associated with the isotropic radiation filling all space thought to be a relic of the big-bang origin of the universe].

(d)

5890 ˚ A - 5896 ˚ A

[double lines of sodium]

(e) 14.4 ke V [energy of a particular transition in

^{57}

Fe nucleus associated with a famous high resolution spectroscopic method (

M ¨ o ssbauer spectroscopy

)].

Q. The Vividh Bharti Station of All India Radio Delhi broadcasts on a frequency of

1, 368 k H z

. Calculate the wavelength

(λ)

of the electromagnetic radiation emitted by the transmitter. Which part of the electromagnetic spectrum does it belong to?

Q. The Vividh Bharati station of all india Radio, Delhi,broadcasts on a frequency of 1,368kHz (kilo hertz). Calculate the wavelength of the electromagnetic radiation emitted by transmitter. Which part of the electromagnetic spectrum does it belong to ?

Q. The 21 cm radio wave emitted by hydrogen in interstellar space is due to the interaction called the hyperfine interaction is atomic hydrogen. The energy of the emitted wave is nearly

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mention one use of part of electromagnetic spectrum to which the wavelength of 21 cm (emitted by hydrogen in interstellar space belongs

Dear Student, Radio waves have wavelengths of 1mm to 100km. Hence, 21cm lies at short wavelength end of radio waves. So we use this part of electromagnetic spectrum in radio transmissions. Regards

Dear Student,

Radio waves have wavelengths of 1mm to 100km. Hence, 21cm lies at short wavelength end of radio waves.
So we use this part of electromagnetic spectrum in radio transmissions.

Regards