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WorksheetsMore LASER and Fibre optics
Total questions: 14
Worksheet time: 9mins
If wave length of photon emitted is 6943 nm then the energy of the emitted photon is
1.78 eV
1.87 eV
1.78 X 10-19 J
1.87 x 10-19 J
If a He-Ne laser transition from E3 to E2 level gives a laser emission of wave length 6328 Angstrom. If the energy of E2 is 15.2 x 10-19 J. How much pumping energy is required, if there is no energy loss in He-Ne laser
1.935 eV
11.423 eV
9.488 eV
11.423 x 10-19 J
Optical fibres act as the medium of transmission of
radio waves
microwaves
electrical signal
visible light
necessary condition for laser action are
active medium, optical pumping, population inversion, optical resonator
active medium, optical pumping, population inversion, optical resonator, two mirrors
active medium, optical pumping, population inversion, optical resonator, mirrors fully and partially reflecting
3 level system, optical pumping, population inversion, optical resonator, mirrors
Above picture shows Ruby laser
Above picture shows He-Ne laser
Above picture shows Co2 laser
Above picture shows Diode laser
The application of laser showing here is
laser drawing
laser welding
laser surgery
laser communication
In this He-Ne laser
active energy levels are 5S and 3P
active energy levels are 4S and 3P
active energy levels are 3P and 3S
active energy levels are 4S and 3S
From He to Ne atoms the electrons moves due to collision
2S of He to 3S of Ne
2S of He to 3S of Ne and 2S of He to 2S of Ne
2S of He to 2S of Ne
2S of He to 3p of Ne
Calculate the probability of stimulated emission if the probability of spontaneous emission is 0.07 in a laser action which emits radiation of wave length 6328 Angstrom. Use the formula A21/B21= 8 pi h (freq)3 /C3 = 8 pi h / (wavelenth)3
B21=1.06 x 1012
B21=1.06
B21=1.06 x 103
B21=1.06 x 10-12
Application of Laser shown here is
Laser cutting
Laser welding
Laser surgery
Laser heating
The application of laser here is
Laser heating
Laser weldig
Laser cutting
Laser surgery
Which type of laser you can see here
Ruby laser
Diode laser
He-Ne laser
Co2 laser
In the picture what does those blue bars indicates
mirrors
energy levels
glass bar
metal blocks
This application of laser is in
laser surgery
laser cutting
laser welding
laser heating
