Which of the following materials is commonly used as a semiconductor in optoelectronic devices?
a) Silicon
b) Copper
c) Aluminum
d) Gold
Answer: a) Silicon
What is the primary function of a photodetector in optoelectronics?
a) Emit light
b) Detect light
c) Amplify light
d) Modulate light
Answer: b) Detect light
What is the phenomenon by which certain materials emit light when an electric current is applied?
a) Photovoltaic effect
b) Electroluminescence
c) Photoconductivity
d) Absorption
Answer: b) Electroluminescence
Which type of optoelectronic device converts light into an electric current?
a) Photodiode
b) Phototransistor
c) Light-emitting diode
d) Laser diode
Answer: a) Photodiode
What is the process by which light is confined and guided within a thin optical fiber?
a) Reflection
b) Refraction
c) Diffraction
d) Total internal reflection
Answer: d) Total internal reflection
Which of the following optoelectronic devices is used to convert an optical signal into an electrical signal?
a) Phototransistor
b) Photodiode
c) Laser diode
d) Light-emitting diode
Answer: b) Photodiode
What is the term used to describe the phenomenon in which the intensity of light decreases as it propagates through a medium?
a) Diffraction
b) Scattering
c) Absorption
d) Reflection
Answer: c) Absorption
Which of the following materials is commonly used as a light source in optoelectronic devices?
a) Gallium arsenide
b) Titanium dioxide
c) Aluminum oxide
d) Silicon carbide
Answer: a) Gallium arsenide
Which type of optoelectronic device emits light when a forward bias voltage is applied?
a) Light-emitting diode
b) Photodiode
c) Phototransistor
d) Laser diode
Answer: a) Light-emitting diode
What is the term used to describe the ability of a material to emit light when excited by an external energy source?
a) Photoluminescence
b) Electroluminescence
c) Photoconductivity
d) Absorption
Answer: a) Photoluminescence
Which of the following is a property of laser light?
a) Incoherent
b) Monochromatic
c) Low intensity
d) Randomly polarized
Answer: b) Monochromatic
What is the term used to describe the ability of a material to change its refractive index in response to an applied electric field?
a) Electro-optic effect
b) Photovoltaic effect
c) Magneto-optic effect
d) Electroreflective effect
Answer: a) Electro-optic effect
Which of the following is a characteristic of a p-n junction in a photodiode?
a) Low resistance in reverse bias
b) High resistance in forward bias
c) High resistance in reverse bias
d) Low resistance in forward bias
Answer: c) High resistance in reverse bias
What is the term used to describe the bending of light as it passes through an interface between two different media?
a) Diffraction
b) Scattering
c) Refraction
d) Reflection
Answer: c) Refraction
Which type of optoelectronic device amplifies an optical signal?
a) Laser diode
b) Phototransistor
c) Light-emitting diode
d) Photodiode
Answer: a) Laser diode
What is the term used to describe the ability of a material to conduct electric current when exposed to light?
a) Photovoltaic effect
b) Electroluminescence
c) Photoconductivity
d) Absorption
Answer: c) Photoconductivity
Which type of optoelectronic device combines the functionality of a photodiode and a transistor?
a) Phototransistor
b) Photovoltaic cell
c) Light-emitting diode
d) Laser diode
Answer: a) Phototransistor
What is the term used to describe the phenomenon in which light is scattered in different directions by small particles or irregularities in a medium?
a) Diffraction
b) Scattering
c) Absorption
d) Reflection
Answer: b) Scattering
Which of the following materials is commonly used as a substrate for optoelectronic devices?
a) Glass
b) Copper
c) Aluminum
d) Gold
Answer: a) Glass
What is the term used to describe the phenomenon in which an electric current is generated in a material in response to incident light?
a) Photovoltaic effect
b) Electroluminescence
c) Photoconductivity
d) Absorption
Answer: a) Photovoltaic effect
Which of the following is a characteristic of a laser diode?
a) Low coherence
b) Broadband emission
c) Low power consumption
d) Incoherent emission
Answer: c) Low power consumption
What is the term used to describe the process by which light is redirected when it strikes the surface of an object?
a) Diffraction
b) Scattering
c) Reflection
d) Refraction
Answer: c) Reflection
Which type of optoelectronic device emits coherent light?
a) Laser diode
b) Phototransistor
c) Photodiode
d) Light-emitting diode
Answer: a) Laser diode
What is the term used to describe a material that allows light to pass through it with minimal reflection or absorption?
a) Transparent
b) Opaque
c) Translucent
d) Reflective
Answer: a) Transparent
Which of the following is an application of optoelectronics?
a) Fiber optics communication
b) Digital signal processing
c) Power generation
d) Thermal imaging
Answer: a) Fiber optics communication
What is the term used to describe a device that converts an optical signal into an electrical signal?
a) Photodetector
b) Photovoltaic cell
c) Phototransistor
d) Photodiode
Answer: a) Photodetector
Which of the following materials is commonly used as a substrate for integrated optoelectronic circuits?
a) Silicon
b) Copper
c) Aluminum
d) Gold
Answer: a) Silicon
What is the term used to describe a device that emits light when an electric current is applied?
a) Light-emitting diode
b) Photodiode
c) Phototransistor
d) Laser diode
Answer: a) Light-emitting diode
Which of the following is a characteristic of a photodiode?
a) Low resistance in reverse bias
b) High resistance in forward bias
c) High resistance in reverse bias
d) Low resistance in forward bias
Answer: c) High resistance in reverse bias
What is the term used to describe the process by which light waves spread out as they pass through an aperture or around obstacles?
a) Diffraction
b) Scattering
c) Absorption
d) Reflection
Answer: a) Diffraction
Which type of optoelectronic device converts an electrical signal into an optical signal?
a) Laser diode
b) Phototransistor
c) Photodiode
d) Light-emitting diode
Answer: d) Light-emitting diode
What is the term used to describe the bending of light as it passes through a medium with different refractive indices?
a) Diffraction
b) Scattering
c) Absorption
d) Refraction
Answer: d) Refraction
Which of the following is a characteristic of a phototransistor?
a) Low resistance in reverse bias
b) High resistance in forward bias
c) High resistance in reverse bias
d) Low resistance in forward bias
Answer: b) High resistance in forward bias
What is the term used to describe the process by which light waves are redirected when they strike a surface with irregularities?
a) Diffraction
b) Scattering
c) Absorption
d) Reflection
Answer: b) Scattering
Which of the following is a characteristic of a photovoltaic cell?
a) Low resistance in reverse bias
b) High resistance in forward bias
c) High resistance in reverse bias
d) Low resistance in forward bias
Answer: d) Low resistance in forward bias
What is the term used to describe a device that emits a narrow beam of light with high intensity?
a) Laser diode
b) Photodiode
c) Phototransistor
d) Light-emitting diode
Answer: a) Laser diode
Which type of optoelectronic device modulates the intensity or frequency of light?
a) Photodiode
b) Phototransistor
c) Laser diode
d) Light-emitting diode
Answer: c) Laser diode
What is the term used to describe the property of a material that determines how easily it allows the transmission of light?
a) Reflectivity
b) Absorbance
c) Transmittance
d) Opacity
Answer: c) Transmittance
Which of the following materials is commonly used as a substrate for optical coatings?
a) Glass
b) Copper
c) Aluminum
d) Gold
Answer: a) Glass
What is the term used to describe the phenomenon in which light waves are redirected back into the medium from which they came?
a) Diffraction
b) Scattering
c) Absorption
d) Reflection
Answer: d) Reflection
Which type of optoelectronic device emits light when exposed to an incident optical signal?
a) Phototransistor
b) Photodiode
c) Laser diode
d) Light-emitting diode
Answer: b) Photodiode
What is the term used to describe a material that allows some light to pass through it but scatters the rest?
a) Transparent
b) Opaque
c) Translucent
d) Reflective
Answer: c) Translucent
Which of the following is an application of optoelectronics?
a) Solar energy conversion
b) Digital signal processing
c) Power generation
d) Thermal imaging
Answer: a) Solar energy conversion
What is the term used to describe the process by which light waves change direction as they pass through a small opening or around obstacles?
a) Diffraction
b) Scattering
c) Absorption
d) Reflection
Answer: a) Diffraction
Which type of optoelectronic device combines the functionality of a photodiode and a transistor?
a) Phototransistor
b) Photovoltaic cell
c) Light-emitting diode
d) Laser diode
Answer: a) Phototransistor
Which of the following materials is commonly used as a light-emitting diode (LED)?
a) Silicon
b) Germanium
c) Gallium arsenide
d) Copper
Answer: c) Gallium arsenide
What is the process called in which a photon of light is absorbed by a material and excites an electron to a higher energy state?
a) Emission
b) Transmission
c) Reflection
d) Absorption
Answer: d) Absorption
What is the term used to describe the phenomenon of bending of light as it passes from one medium to another?
a) Diffraction
b) Dispersion
c) Refraction
d) Reflection
Answer: c) Refraction
Which of the following devices is used to convert an optical signal into an electrical signal?
a) Photodiode
b) Phototransistor
c) Photovoltaic cell
d) Light sensor
Answer: a) Photodiode
What is the term used to describe a device that can control the intensity or direction of light?
a) Photodiode
b) Phototransistor
c) Photovoltaic cell
d) Optical switch
Answer: d) Optical switch
