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Hanuman Raju Mehra
Hanuman Raju Mehra
Asked: 3 years agoIn: Laser

Calculate the wavelength of radiation emitted by an LED made up of a semiconducting material with band gap energy 2.8eV.

(a) 2.8 Å

(b) 4.3308 Å

(c) 5548.4 Å

(d) 4430.8 Å

Sarthaks
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Anand Barman
Anand Barman
Asked: 3 years agoIn: Laser

DVD uses the laser.

(a) True

(b) False

The question was posed to me in class test.

My question is from Laser in portion Laser of Engineering Physics II

Sarthaks
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  • 1
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Teena Hassan Agrawal
Teena Hassan Agrawal
Asked: 3 years agoIn: Laser

Which of the following is a unique property of laser?

(a) Directional

(b) Speed

(c) Coherence

(d) Wavelength

Sarthaks
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  • 1
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Ajinkya Dayal
Ajinkya Dayal
Asked: 3 years agoIn: Laser

Which of the following can be used in the vibrational analysis of structure?

(a) Maser

(b) Quarts

(c) Electrical waves

(d) Laser

Sarthaks
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  • 1
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  • 0
Parveen Nazir Choudhury
Parveen Nazir Choudhury
Asked: 3 years agoIn: Laser

Which of the following is used in atomic clocks?

(a) Laser

(b) Quartz

(c) Maser

(d) Helium

Sarthaks
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Pranab Raj Keer
Pranab Raj Keer
Asked: 3 years agoIn: Laser

Which of the following is an example of optical pumping?

(a) Ruby laser

(b) Helium-Neon laser

(c) Semiconductor laser

(d) Dye laser

Sarthaks
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Kajal Balay
Kajal Balay
Asked: 3 years agoIn: Laser

Laser is called as a non-material knife.

(a) False

(b) True

This question was addressed to me during an interview for a job.

My question is based upon Laser topic in portion Laser of Engineering Physics II

Sarthaks
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  • 1
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  • 0
Divya Mangat
Divya Mangat
Asked: 3 years agoIn: Laser

What is the need to achieve population inversion?

(a) To excite most of the atoms

(b) To bring most of the atoms to ground state

(c) To achieve stable condition

(d) To reduce the time of production of laser

Sarthaks
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