Get HF E/R 2011-2023

A wavelength can be calculated by dividing the velocity of a wave by its frequency. This is often expressed as the equation seen here. λ represents wavelength, expressed in meters. The v is wave velocity, calculated as meters per second (mps). And the f stands for frequency, which is measured in hertz (Hz).

Einstein explained the phenomenon of photoelectric effect and gave the equation $ E = hf $ in which E stands for energy of the photon, h stands for Planck's constant and f stands for frequency. Thus, E gives the information of energy associated with a certain frequency $ f $ .

The equation, E=hf, is referred to as the Planck relation or the Planck-Einstein relation. The letter h is named after Planck, as Planck's constant. Energy (E) is related to this constant h, and to the frequency (f) of the electromagnetic wave.

The formula is written as $E = hf$ which is given in the question. Here, E stands for energy in a photon. f stands for the frequency of light. and h stands for Planck's constant and This 'h' the Planck's constant has a fixed value of about $h = 6.62 \times {10^{ - 34}}J\sec $ which has a unit of Joule seconds.

f = photon frequency. λ = photon wavelength. c = speed of light (3 x 108 meters/second) The photon energy at 1 Hz is equal to 6.626 × 10−34 J and the Planck's constant in terms of eV is 4.14 × 10−15 eV· s. Read more: Photon energy formula.

The energy of a photon can be calculated from Planck's equation E = hc/λ, with h = 6.625 × 10–34 Js and c is the velocity of light, which results in values of 4.9 × 10–19 J (400 nm) to 7.1 × 10–19 J (280 nm) for the electromagnetic UV spectrum.

In the given equation, E stands for energy, h represents Planck's constant and f stands for frequency. This equation is useful to determine the energy or frequency when another term is given.

The energy E of a photon is equal to hv = hc/λ, where v is the frequency of the electromagnetic radiation and λ is its wavelength.