Speed of Electromagnetic Waves in Vacuum Formula : The speed of electromagnetic waves in a vacuum is a fundamental constant denoted by "c," representing the speed of light. With an approximate value of 3.00 x 10^8 meters per second. It is defined by the relationship c = 1/√(ε₀μ₀), where ε₀ is the vacuum permittivity and μ₀ is the vacuum permeability.
If you are aligning your preparation with the NEET 2024 syllabus , the Speed of Electromagnetic Waves in Vacuum Formula is a key topic to be covered.is the wave number. is a mathematical constant (approximately 3.14159). is the wavelength of the wave.
is the frequency. is the angular frequency
is the speed of the wave. is the wavelength. is the frequency
Electromagnetic Spectrum | |||
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Region | Wavelength Range (Approximate) | Frequency Range (Approximate) | Characteristics |
Radio Waves | >1 mm - 100 km | <300 GHz | Used for communication, broadcasting, radar, and navigation. |
Microwaves | 1 mm - 1 m | 300 GHz - 300 MHz | Used in microwave ovens, satellite communication, and certain types of radar. |
Infrared | 1 mm - 700 nm | 300 GHz - 430 THz | Felt as heat, used in night-vision devices, remote controls, and infrared imaging. |
Visible Light | 700 nm - 400 nm | 430 THz - 750 THz | Detectable by the human eye, each color corresponds to a specific wavelength. |
Ultraviolet | 400 nm - 10 nm | 750 THz - 30 PHz | Causes sunburn, used in disinfection and certain types of material analysis. |
X-rays | 10 nm - 0.01 nm | 30 PHz - 30 EHz | Used in medical imaging, material testing, and security screening. |
Gamma Rays | < 0.01 nm | >30 EHz | Generated by nuclear reactions, used in medical imaging and cancer treatment. |