Question

What is Emission spectra?Explain types.

Answer 1

When emitted radiation is passed directly through the prism and is received on the photographic plate, the spectrum obtained is called as Emission spectra.
Depending on the source of  radiation, it is mainly of two types-
1) Continuous spectrum : when a white light from any source like sun, bulb is analysed by passing through a prism , it is observed that is splits up into 7 different colours ( VIBGYOR). These colours are so continuous that they merge into the next, thus giving a continuous spectrum.
2) Line spectrum : When the light produced by heating a salt like NaCl is resolved in a spectroscope, it is found that no continuous spectra is observed  but some isolated coloured lines are obtained on the photographic plate separated from each other. This spectra is line spectra

Answer 2

$\textbf{Hey there}$!

$\textbf{Emission spectra}$:

The light emitted by a source of light and resolved into its constituents wavelengths is called emission spectra.

$\textbf{This Is Of Three Types}$:

➡$\textbf{Continuous Emission Spectrum}$:

A continuous emission spectrum is one, Which covers a wide range of wavelengths without any gap or discontinuity.

➡$\textbf{Line Emission Spectrum}$:

A line emission is one, Which consists of bright light( wavelengths ) separated from each other by dark spaces.

➡$\textbf{Band Emission Spectrum}$:

A band emission spectrum is one, Which consists of a number of bright bands of light, sharp at one end and fading off the other end.

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