the largest and the shortest wavelength of a visible light a 700 and 400 nm respectively calculate the frequency and energy associated with photon!
Answers
Answer:
What is Wavelength?
Wavelength is defined as the property of a wave in which the distance between the identical points between the two successive waves are calculated.
It is denoted by the Greek letter lambda (λ). Therefore, the distance between either one crest or trough of one wave and the next wave is known as wavelength.
The wavelength of light is defined as “The distance between the two successive crests or troughs of the light wave”.
What is Visible Spectrum?
The visible spectrum is nothing but the observable region of the electromagnetic wave which is visible to human eyes. In the electromagnetic spectrum, the visible spectrum ranges from the infrared region to the UV region. The visible light lies in between the infrared and ultraviolet range of wavelengths. The human eye can detect the light spectrum ranging from 400 nanometers (violet) to about 700 nanometers (red). Other electromagnetic radiations are either too small or too large to capture for the human eye and are out of biological limitations.
We can see these waves as the colours of the rainbow where each colour includes a different wavelength. We can also see the sun’s outermost layer – the corona in the visible light.
Wavelength of Light
When the visible light travels through a prism, the visible light gets separated into a spectrum of colour. Red colour has the longest wavelength of 700 nm, and violet has the shortest wavelength of 380 nm. These colours arrange themselves according to the wavelength as the spectrum of rainbow colours.
How is the Wavelength of Light Calculated?
As light has the properties of a wave and a particle, it can be expressed in two equations:
ν=λf………………..(1)
E=hf…………….(2)
Where,
ν is the velocity of the light.
λ is the wavelength of the light.
f is the frequency of the light.
E is the energy of the light wave.
h is the Planck’s Constant i.e. 6.64×10−34joule⋅second
Here, the first equation denotes the wave nature of the light and the second equation denotes the particle nature of the light.
Colour
Wavelength
Frequency
Violet
380-450 nm
668-789 THz
Blue
450-495 nm
606-668 THz
Green
495-570 nm
526-606 THz
Yellow
570-590 nm
508-526 THz
Orange
590-620 nm
484-508 THz
Red
620-750 nm
400-484 THz
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