Optical Sources MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Optical Sources, a fundamental topic in the field of Optical Communication. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Optical Sources MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Optical Sources mcq questions that explore various aspects of Optical Sources problems. Each MCQ is crafted to challenge your understanding of Optical Sources principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Optical Communication tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Optical Sources MCQs are your pathway to success in mastering this essential Optical Communication topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Optical Sources. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Optical Sources knowledge to the test? Let's get started with our carefully curated MCQs!

Optical Sources MCQs | Page 1 of 18

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Q1.
A device which converts electrical energy in the form of a current into optical energy is called as ___________

a.

Optical source

b.

Optical coupler

c.

Optical isolator

d.

Circulator

Discuss
Answer: (a).Optical source
Q2.
How many types of sources of optical light are available?

a.

One

b.

Two

c.

Three

d.

Four

Discuss
Answer: (c).Three
Q3.
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

a.

Gravitation constant

b.

Planck’s constant

c.

Permittivity

d.

Attenuation constant

Discuss
Answer: (b).Planck’s constant
Q4.
The radiation emission process (emission of a proton at frequency) can occur in __________ ways.

a.

Two

b.

Three

c.

Four

d.

One

Discuss
Answer: (a).Two
Q5.
Which process gives the laser its special properties as an optical source?

a.

Dispersion

b.

Stimulated absorption

c.

Spontaneous emission

d.

Stimulated emission

Discuss
Answer: (d).Stimulated emission
Q6.
An incandescent lamp is operating at a temperature of 1000K at an operating frequency of 5.2×10¹⁴ Hz. Calculate the ratio of stimulated emission rate to spontaneous emission rate.

a.

3×10⁻¹³

b.

1.47×10⁻¹¹

c.

2×10⁻¹²

d.

1.5×10⁻¹³

Discuss
Answer: (b).1.47×10⁻¹¹
Q7.
The lower energy level contains more atoms than upper level under the conditions of ________________

a.

Isothermal packaging

b.

Population inversion

c.

Thermal equilibrium

d.

Pumping

Discuss
Answer: (c).Thermal equilibrium
Q8.
__________________ in the laser occurs when photon colliding with an excited atom causes the stimulated emission of a second photon.

a.

Light amplification

b.

Attenuation

c.

Dispersion

d.

Population inversion

Discuss
Answer: (a).Light amplification
Q9.
A ruby laser has a crystal of length 3 cm with a refractive index of 1.60, wavelength 0.43 μm. Determine the number of longitudinal modes.

a.

1×10²

b.

3×10⁶

c.

2.9×10⁵

d.

2.2×10⁵

Discuss
Answer: (d).2.2×10⁵
Q10.
A semiconductor laser crystal of length 5 cm, refractive index 1.8 is used as an optical source. Determine the frequency separation of the modes.

a.

2.8 GHz

b.

1.2 GHz

c.

1.6 GHz

d.

2 GHz

Discuss
Answer: (c).1.6 GHz
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