Question

In an electronic transition atom cannot emit which of the following and why ?
a)Visible light
b)gamma rays
c)Infrared light
d)Ultra violet light

Answer 1

@paki @ParthKohli

Answer 2

have a look here please...

http://www.avogadro.co.uk/light/bohr/spectra.htm

Answer 3

yes it says that photons are emitted in emission spectra

Answer 4

then...?

Answer 5

higher the energy level from which the electron gets transitioned more will be the frequency of radiation emitted..m i ryt ?

Answer 6

????

Answer 7

I think it will be gamma rays...since its very high energy rays and is usually emitted in gamma decay

Answer 8

electronic transitions mainly emit light rays like visible, X-Ray, UV, infra etc

Answer 9

@Abhisar it is asking about "cannot"...

Answer 10

yes that is what i said...i think the answer will be gamma rays...i.e electronic transitions cannot emit gamma rays

Answer 11

@paki

Answer 12

A gamma photon is equivalent to energies like 30 GeV

Answer 13

That is too much for an electronic transition

Answer 14

but electronic transitions CAN emit gamma rays...

Answer 15

okay..how can u say that ?

Answer 16

The energy difference between the orbit no 1 and orbit no 2 is 10.2 ev

Answer 17

and it is the largest energy difference..after that energy difference increases like 1.89 ev - .66 ev

Answer 18

Gamma rays are produced in the disintegration of radioactive atomic nuclei and in the decay of certain subatomic particles. The commonly accepted definitions of the gamma-ray and X-ray regions of the electromagnetic spectrum include some wavelength overlap, with gamma-ray radiation having wavelengths that are generally shorter than a few tenths of an angstrom (10−10 meter) and gamma-ray photons having energies that are greater than tens of thousands of electron volts (eV). There is no theoretical upper limit to the energies of gamma-ray photons and no lower limit to gamma-ray wavelengths; observed energies presently extend up to a few trillion electron volts—these extremely high-energy photons are produced in astronomical sources through currently unidentified mechanisms...

Answer 19

so...see its clear it says disintegration of ATOMIC NUCLEI

Answer 20

electronic transition is a different thing

Answer 21

It also says gamma rays are equivalent to trillions of ev

Answer 22

yeh

Answer 23

electronic transitions produce energies in mere evs

Answer 24

what about ultra-violet light... i am thinking this is the rite answer.... you agree @Abhisar

Answer 25

aaammm..UV ranges between 3 eV to 12.4 eV, so i think electronic transitions can easily emit it

Answer 26

hmmm then :)

Answer 27

I'll go with Gamma rays...its the only radiation among the options given which can not be emitted in electronic transition

Answer 28

another can be cosmic rays

Answer 29

yeah, this is rite one.... GAMMA RAYS.... thanks for nice discussion bro.... :)

here is an example of that....

"" Ultraviolet (UV) radiation is defined as that portion of the electromagnetic spectrum between x rays and visible light, i.e., between 40 and 400 nm (30–3 eV). The UV spectrum is divided into Vacuum UV (40-190 nm), Far UV (190-220 nm), UVC (220-290 nm), UVB (290-320), and UVA (320-400 nm). The sun is our primary natural source of UV radiation. Artificial sources include tanning booths, black lights, curing lamps, germicidal lamps, mercury vapor lamps, halogen lights, high-intensity discharge lamps, fluorescent and incandescent sources, and some types of lasers (excimer lasers, nitrogen lasers, and third harmonic lasers)"" ... @Abhisar

Answer 30

I was looking at the link u provided...even it says that UV rays are emitted in Lyman series of ET

Answer 31

hmmm :)

Answer 32

and Thnx to u too for the discussion :)

Answer 33

\(\huge\ddot\smile\)

Answer 34

pleasure bro :)

Answer 35

Thnx @paki & @abhisar