Unit 4B: EM Spectrum

Flashcards about the EM Spectrum

What does EM Spectrum stand for?

Electromagnetic Spectrum

What three properties are associated with the EM Spectrum?

Wavelength, frequency, and energy determine the properties of electromagnetic radiation.

What type of calculations are included in Unit 4B?

Calculations involving wavelength, frequency, speed, and energy of electromagnetic waves.

What is the topic of the POGIL activity related to the EM Spectrum?

Electron, Energy, and Light

Define Wavelength.

The distance between successive crests of a wave.

Define Frequency.

The number of waves that pass a given point per unit time.

Define Speed of Light.

The constant speed at which all electromagnetic radiation travels in a vacuum, approximately 3.00 \times 10^8 meters per second.

Define Energy in the context of EM waves.

The measure of the capacity to do work; in the context of electromagnetic radiation, it is directly proportional to frequency.

What does EM Spectrum stand for?

Electromagnetic Spectrum

What three properties are associated with the EM Spectrum?

Wavelength, frequency, and energy determine the properties of electromagnetic radiation.

What type of calculations are included in Unit 4B?

Calculations involving wavelength, frequency, speed, and energy of electromagnetic waves.

What is the topic of the POGIL activity related to the EM Spectrum?

Electron, Energy, and Light

Define Wavelength.

The distance between successive crests of a wave.

Define Frequency.

The number of waves that pass a given point per unit time.

Define Speed of Light.

The constant speed at which all electromagnetic radiation travels in a vacuum, approximately 3.00 \times 10^8 meters per second.

Define Energy in the context of EM waves.

The measure of the capacity to do work; in the context of electromagnetic radiation, it is directly proportional to frequency.

What is the relationship between wavelength and frequency?

They are inversely proportional; as wavelength increases, frequency decreases, and vice versa.

What is the mathematical relationship between the speed of light, frequency, and wavelength?

c = \lambda \nu, where c is the speed of light, \lambda is the wavelength, and \nu is the frequency.

What units are used to measure wavelength?

Meters (m), nanometers (nm), or other units of length.

What units are used to measure frequency?

Hertz (Hz), which is equivalent to cycles per second (s^{-1}).

What is the range of the electromagnetic spectrum?

From very long radio waves to very short gamma rays.

List the main regions of the electromagnetic spectrum in order of increasing frequency.

Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays.

Which type of electromagnetic radiation has the longest wavelength?

Radio waves.

Which type of electromagnetic radiation has the highest frequency?

Gamma rays.

What is visible light?

The portion of the electromagnetic spectrum that is visible to the human eye.

What range of wavelengths corresponds to visible light?

Approximately 400 nm to 700 nm.

What are the colors of visible light in order of increasing frequency?

Red, orange, yellow, green, blue, indigo, violet.

What is the relationship between energy and frequency of electromagnetic radiation?

They are directly proportional; as frequency increases, energy increases.

What is the equation that relates energy and frequency of a photon?

E = h \nu, where E is energy, h is Planck's constant, and \nu is frequency.

What is Planck's constant?

A fundamental constant that relates the energy of a photon to its frequency, approximately 6.626 \times 10^{-34} Joule-seconds (J·s).

How is energy measured in the context of electromagnetic radiation?

Typically in Joules (J) or electron volts (eV).

What are some common uses of radio waves?

Broadcasting, communication, and radar.

What are some common uses of microwaves?

Cooking, communication, and radar.

What are some common uses of infrared radiation?

Thermal imaging, remote controls, and heating.

What are some common uses of ultraviolet radiation?

Sterilization, tanning, and vitamin D production.

What are some common uses of X-rays?

Medical imaging and security scanning.

What are some common uses of gamma rays?

Cancer treatment and sterilization.

Define photon.

A discrete packet of electromagnetic energy.