Quick Answer: What is the visible wavelength range in the electromagnetic spectrum?

The visible wavelengths cover a range from approximately 0.4 to 0.7 µm. The longest visible wavelength is red and the shortest is violet. Common wavelengths of what we perceive as particular colours from the visible portion of the spectrum are listed below.

What are the frequency and wavelength ranges of visible light?

Visible light falls in the range of the EM spectrum between infrared (IR) and ultraviolet (UV). It has frequencies of about 4 × 1014 to 8 × 1014 cycles per second, or hertz (Hz) and wavelengths of about 740 nanometers (nm) or 2.9 × 105 inches, to 380 nm (1.5 × 105 inches).

What are the 7 ranges of the electromagnetic spectrum?

The EM spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are: radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.

What is the range of wavelengths in nanometers nm covering visible electromagnetic spectrum?

Visible light is usually defined as having wavelengths in the range of 400–700 nanometers (nm) or one billionth of a meter.

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How do you find the range of a wavelength?

How do you measure wavelength?

  1. Use a photometer to measure the energy of a wave.
  2. Convert the energy into joules (J).
  3. Divide the energy by Planck’s constant, 6.626 x 1034, to get the frequency of the wave.
  4. Divide the speed of light, ~300,000,000 m/s, by the frequency to get wavelength.

What is the longest wavelength?

Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.

Which electromagnetic has the longest wavelength?

Radio Waves — The waves in the electromagnetic spectrum that have the longest wavelengths and lowest frequency are called radio waves.

Which is having minimum wavelength?

According to this spectrum, violet light has the minimum wavelength and red light has the maximum wavelength. The frequency of a wave is inversely proportional to its wavelength for a constant speed.

What is the wavelength range of yellow?

The visible spectrum

colour* wavelength (nm) frequency (1014 Hz)
yellow 580 5.16
green 550 5.45
cyan 500 5.99
blue 450 6.66

What is the wavelength range of ultraviolet?

The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm).

What is the wavelength of indigo?

The range of wavelength for indigo is around 425–450 nm. It’s hard for the human eye to distinguish and is usually considered a subset of violet.


Colour Wavelength Range (nm)
Violet 380-450

How do you find wavelength from frequency?

Wavelength can be calculated using the following formula: wavelength = wave velocity/frequency. Wavelength usually is expressed in units of meters. The symbol for wavelength is the Greek lambda λ, so λ = v/f.

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How do you find wavelength in chemistry?

Wavelength is related to energy and frequency by E = hν = hc/λ, where E = energy, h = Planck’s constant, ν = frequency, c = the speed of light, and λ = wavelength.

What does Lambda mean in physics?

Wavelength is usually denoted by the Greek letter lambda (λ); it is equal to the speed (v) of a wave train in a medium divided by its frequency (f): λ = v/f. …