The collimator in a spectrometer is used

Explain emission and absorption spectra ( Diagram not necessary)

Discuss the action of a Bainbridge mass spectrometer to determine the isotopic masses.

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

First adjustment of a spectrometer is :

Spectrometer is used to measure: