Understand the nature of light and its place in the electromagnetic spectrum.
299,792,458 meters per second (approximately 3.00 x 10^8 m/s)
Light that can be detected by the human eye, typically within the wavelength range of 400 to 700 ...
400 to 700 nanometers
The complete range of electromagnetic waves on a continuous distribution from a very low range of...
Radio waves have the longest wavelength in the electromagnetic spectrum and can be used for long-...
Used for radar, satellite and wireless communication, as well as heating food in microwave ovens
Located between microwaves and visible light in the electromagnetic spectrum, carrying more energ...
UV radiation lies between visible light and X-rays and can cause damage to skin and eyes
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299,792,458 meters per second (approximately 3.00 x 10^8 m/s)
The Speed of Light in a Vacuum
Light that can be detected by the human eye, typically within the wavelength range of 400 to 700 nanometers
The Concept of Visible Light
400 to 700 nanometers
The Range of Wavelengths for Visible Light
The complete range of electromagnetic waves on a continuous distribution from a very low range of frequencies and energy levels, with a correspondingly long wavelength, to a very high range of frequencies and energy levels, with a correspondingly short wavelength
The Electromagnetic Spectrum
Radio waves have the longest wavelength in the electromagnetic spectrum and can be used for long-distance communication
Radio Waves and Their Properties
Used for radar, satellite and wireless communication, as well as heating food in microwave ovens
Microwaves and Their Applications
Located between microwaves and visible light in the electromagnetic spectrum, carrying more energy than microwaves
Infrared Radiation
UV radiation lies between visible light and X-rays and can cause damage to skin and eyes
Ultraviolet Radiation
Used in medical imaging and in treating cancer, as they can penetrate many materials
X-rays and Their Uses
The most energetic waves in the electromagnetic spectrum, often generated by radioactive atoms and nuclear explosions
Gamma Rays and Their High Energy
Inversely proportional (higher frequency means shorter wavelength)
The Relationship Between Frequency and Wavelength
Particles of light that carry electromagnetic radiation
The Concept of Photons
The energy of a photon is directly proportional to its frequency, but inversely proportional to its wavelength. Hence, the energy is highest at the gamma rays end of the spectrum and lowest at the radio-wave end
The Energy of Photons in Different Parts of the Spectrum
Refraction is the bending of waves when they enter a medium at an angle, while dispersion is the process by which a beam of light or other system of waves is spread out according to wavelength
The Concept of Refraction and Dispersion of Light
Red, Orange, Yellow, Green, Blue, Indigo, Violet
The Colors of Visible Light (ROYGBIV)
Light travels slower in denser mediums due to a process called refraction
The Effect of Medium on Light Speed
Reflection occurs when waves bounce off a surface, while refraction is the change in direction of a wave due to a change in its transmission medium
The Difference Between Reflection and Refraction
Polarization of Light is a phenomenon due to which the oscillation of light are restricted in a particular direction
Polarization of Light
They are used in various forms of communication like radio, television, cellular networks, etc. due to their ability to penetrate obstacles and cover long distances
The Use of Electromagnetic Waves in Communication
Used for sterilization, medical imaging, and radiation therapy respectively
Applications of Ultraviolet, X-rays, and Gamma Rays in Medicine
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