IBEC ELECTROLYSIS & LASER STATE TEST
EXAM 350 UNIQUE MULTIPLECHOICE
QUESTIONS AND ANSWERS WITH DETAILED
RATIONALES LATEST UPDATE
Section 1: Laser Physics and Fundamentals (Questions 135)
1. What does the acronym LASER stand for?
A) Light Absorption by Stimulated Emission of Radiation
B) Light Amplification by Stimulated Emission of Radiation
C) Laser Amplification by Systematic Emission of Radiation
D) Light Amplification by Spontaneous Emission of Radiation
Correct Answer: B
Rationale: LASER is an acronym for Light Amplification by Stimulated Emission
of Radiation. Stimulated emission is the process by which an incoming photon
causes an excited atom to release a second photon with identical properties,
creating amplification of light.
2. What is the distance measured in nanometers between two peaks or two troughs
of a light wave known as?
A) Frequency
1
,B) Amplitude
C) Wavelength
D) Velocity
Correct Answer: C
Rationale: Wavelength is the distance between two successive peaks or troughs of
a wave, measured in nanometers (nm). It determines the color and penetration
depth of laser light.
3. Light of only one color and one specific wavelength is known as:
A) Polychromatic
B) Monochromatic
C) Collimated
D) Coherent
Correct Answer: B
Rationale: Monochromatic light consists of a single wavelength and color. This is
one of the key properties of laser light, along with coherence and collimation.
4. Refraction is also known as:
2
,A) Reflection
B) Transmission
C) Absorption
D) Scattering
Correct Answer: B
Rationale: Refraction refers to the transmission of light through a medium, where it
changes direction due to a change in speed. This occurs when light passes from one
medium to another with different densities.
5. Who theorized stimulated emission?
A) Theodore Maiman
B) Albert Einstein
C) Gordon Gould
D) Charles Townes
Correct Answer: B
Rationale: Albert Einstein theorized stimulated emission in 1917. His work on the
quantum theory of radiation laid the foundation for the development of the laser
decades later.
3
, 6. The part of the laser that contains the active medium is called the:
A) Optical cavity
B) Resonator cavity
C) Gain medium chamber
D) Pump source
Correct Answer: B
Rationale: The resonator cavity (also called the optical cavity) contains the active
medium where light amplification occurs. It is bounded by mirrors that reflect light
back and forth through the medium.
7. The states of equilibrium or middle state of light in stimulated emission is
known as the:
A) Ground State
B) Excited State
C) Metastable State
D) Singlet State
Correct Answer: C
Rationale: The metastable state is a middle or equilibrium state where electrons
can remain for a longer period before returning to the ground state. This allows for
population inversion necessary for laser action.
4
EXAM 350 UNIQUE MULTIPLECHOICE
QUESTIONS AND ANSWERS WITH DETAILED
RATIONALES LATEST UPDATE
Section 1: Laser Physics and Fundamentals (Questions 135)
1. What does the acronym LASER stand for?
A) Light Absorption by Stimulated Emission of Radiation
B) Light Amplification by Stimulated Emission of Radiation
C) Laser Amplification by Systematic Emission of Radiation
D) Light Amplification by Spontaneous Emission of Radiation
Correct Answer: B
Rationale: LASER is an acronym for Light Amplification by Stimulated Emission
of Radiation. Stimulated emission is the process by which an incoming photon
causes an excited atom to release a second photon with identical properties,
creating amplification of light.
2. What is the distance measured in nanometers between two peaks or two troughs
of a light wave known as?
A) Frequency
1
,B) Amplitude
C) Wavelength
D) Velocity
Correct Answer: C
Rationale: Wavelength is the distance between two successive peaks or troughs of
a wave, measured in nanometers (nm). It determines the color and penetration
depth of laser light.
3. Light of only one color and one specific wavelength is known as:
A) Polychromatic
B) Monochromatic
C) Collimated
D) Coherent
Correct Answer: B
Rationale: Monochromatic light consists of a single wavelength and color. This is
one of the key properties of laser light, along with coherence and collimation.
4. Refraction is also known as:
2
,A) Reflection
B) Transmission
C) Absorption
D) Scattering
Correct Answer: B
Rationale: Refraction refers to the transmission of light through a medium, where it
changes direction due to a change in speed. This occurs when light passes from one
medium to another with different densities.
5. Who theorized stimulated emission?
A) Theodore Maiman
B) Albert Einstein
C) Gordon Gould
D) Charles Townes
Correct Answer: B
Rationale: Albert Einstein theorized stimulated emission in 1917. His work on the
quantum theory of radiation laid the foundation for the development of the laser
decades later.
3
, 6. The part of the laser that contains the active medium is called the:
A) Optical cavity
B) Resonator cavity
C) Gain medium chamber
D) Pump source
Correct Answer: B
Rationale: The resonator cavity (also called the optical cavity) contains the active
medium where light amplification occurs. It is bounded by mirrors that reflect light
back and forth through the medium.
7. The states of equilibrium or middle state of light in stimulated emission is
known as the:
A) Ground State
B) Excited State
C) Metastable State
D) Singlet State
Correct Answer: C
Rationale: The metastable state is a middle or equilibrium state where electrons
can remain for a longer period before returning to the ground state. This allows for
population inversion necessary for laser action.
4
