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Questions and Answers

What is an optoelectronic device?

An electronic technology in which optical radiation is emitted, modified, or converted.

Which of the following is not an optoelectronic device?

Laser Diodes

Photodiodes

Resistors (correct)

Light-Emitting Diodes

Lasers convert electrical energy into optical energy.

True

Define 'photon'.

A quantum of electromagnetic energy with no mass and no charge. Signup and view all the answers

Electromagnetic spectrum includes radiation of all frequencies or wavelengths, including __________.

optical frequencies Signup and view all the answers

What is 'radiometry'?

The measurement of radiant electromagnetic energy at specific wavelength ranges. Signup and view all the answers

What determines the phase velocity of electromagnetic waves?

The refractive index. Signup and view all the answers

Which of the following bands of the electromagnetic spectrum has frequencies between about 10 kHz and 300,000 MHz?

Radio Frequency Signup and view all the answers

The quantum energy of electromagnetic radiation can be calculated using the formula __________.

$E_p = hf$ Signup and view all the answers

How does wavelength relate to frequency?

They are related by the equation $λf = c$. Signup and view all the answers

What is optoelectronic technology?

Technology in which optical radiation is emitted, modified, or converted. Signup and view all the answers

Which of the following is an example of an optoelectronic device?

LEDs Signup and view all the answers

A ___ is a quantum of electromagnetic energy with no mass and no charge.

photon Signup and view all the answers

Electromagnetic radiation includes only visible light.

False Signup and view all the answers

What is the relationship between wavelength and frequency?

$λf = c$ Signup and view all the answers

Which band of the electromagnetic spectrum has wavelengths between about 1 nm and 10^5 nm?

Infrared Signup and view all the answers

Match the following electromagnetic spectrum divisions with their corresponding wavelength range:

Radio Frequency (RF) = 10 kHz to 300,000 MHz Microwave Spectrum = 1 meter to 1 millimeter Shortwave Spectrum = 200 meters to 20 meters X-rays = 10 nm to 0.01 nm Signup and view all the answers

What does the refractive index describe?

It describes how light propagates through a material. Signup and view all the answers

Study Notes

Optoelectronic Devices

Combine optics and electronics for applications like fiber optic communications, image processing, and optical sensing.
Photodiodes convert light to electrical signals, LEDs convert electrical energy to light, and laser diodes emit light in a laser beam.

Photonics and Electronics

Photonics studies light (photons) and its applications, while electronics deals with electrons and their applications.

Electromagnetic Energy

Can be described by wavelength (λ), frequency (f), or quantum energy (E_p).
Travels as waves with a phase velocity (v_p).
The refractive index (n) of a material affects the speed of light within it.

Electromagnetic Spectrum

Ranges from electrical power transmission to high-energy rays.
Includes radio frequency (RF), shortwave, microwave, light, and X-rays.
Wavelength and frequency are related by λf = c, where c is the speed of light in vacuum.

Light

Refers to electromagnetic radiation in the ultraviolet, visible, and infrared bands.
Color in the visible spectrum is determined by wavelength (λ).
The refractive index (n) affects the effective wavelength and phase velocity of light inside a material.

Optical Spectrum

Covers a broad range of wavelengths from 1 nm to 10^5 nm.
Interactions with materials rely on electronic and molecular transitions.
Subdivided into ultraviolet (UV), visible, and infrared (IR) bands.

Wave-Photon Duality

Light exhibits both wave-like and quantum behavior.
Wave model works for most properties, while quantum model is needed for emission, absorption, and laser diodes/photodiodes.
Quantum energy (E_q) is related to frequency (f) and wavelength (λ) by E_q = hf = hc/λ.