IMA SUBJECT

Which radiation source has electrode in its construction ?

• Tungsten lamp

• Hydrogen discharge lamp

• Xenon Discharge Lamp

• Mercury lamp

Which device is used to isolate the radiation of the desired wavelength from wavelength of the continuous spectra ?

• Monochromator

• Radiation source

• Detector

• Recorder

Diffraction grating is consists of a

• Glass

• Quartz

• Alkyl halide

• All of the above

The work of Entrance slit is?

• To get narrow source

• To render light parallel

• To disperse radiation

• To fall on sample cell

Collimator is used for?

• To reform the image of the entrance slit.

• To get narrow source

• To fall on sample cell

• To disperse radiation

Exit slit used for

• To reform the image of the entrance slit.

• To get narrow source

• To fall on sample cell

• None of these

Which type of vapour is stored in Mercury lamp ?

• Mercury vapour

• Hydrogen vapour

• Xenon vapour

• Ozone

A device which converts electrical energy in the form of a current into optical energy is called as ___________

• Optical source

• Optical coupler

• Optical isolator

• Circulator

How many types of sources of optical light are available?

• 1

• 2

• 3

• 4

The frequency of the absorbed or emitted radiation is related to difference in energy E between the higher energy state E2 and the lower energy state E1. State what h stands for in the given equation?

E = E2 - E1 = hf

• Gravitation constant

• Planck’s constant

• Boltzmann constant

• None of these