Respuesta :
The wavelength of 4.2×10^15 Hertz frequency is 71.4nm.
Given,
The frequency = 4.2×10^15 Hertz
As we know,
frequency = C / λ ( lambda)
Where, C = speed of light =3×10^8 m/s
lambda = wavelength.
Thus , wavelength = Speed of light / frequency
= (3×10^8 m/s) / (4.2×10^15 s^-1 )
= 7.14 ×10^-8 m
= 71.4 ×10^-9 m
wavelength= 71.4 nm
Hence, the wavelength of 4.2×10^15 Hertz frequency is 71.4 nm.
1 nanometre = 10^-9 m.
Wavelength :
The distance between two succeeding crests or troughs of a wave is known as its wavelength. It is measured in the wave's direction.
It is the distance between a wave's crests and troughs, respectively (which may be an electromagnetic wave, a sound wave, or any other wave). The wave's crest is its highest point, while its dip is its lowest. Because a wavelength represents a distance or length, it is expressed in length units like metres, centimetres, milimeters, nanometers, etc.
E= hf
E= h.c/λ
Where,
c 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 ( 6.64 × 10-34 joule.second)
Wavelength of visible light ranges from 400nm to 700nm.
Learn more about wavelength here :
brainly.com/question/10728818
#SPJ9
