Electromagnetic radiation with wavelength of 745 nm appears as red lighting to human eye. the energy of the photon is this light is

The energy of the photon is E = 2.67.10⁻¹⁹ J

Further explanation

The photoelectric effect is an electron coming out of a metal because of electromagnetic radiation

One type of electromagnetic radiation is light

Electrons can come out of metal because they absorb electromagnetic energy radiated on metals. There is also kinetic energy released from metal, which is according to the equation:

E = hf - hfo

fo = the threshold frequency of electromagnetic waves

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

E = h. f

Where

h = Planck's constant (6.626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves

f = c / λ

c = speed of light

= 3,10⁸

λ = wavelength

Known wavelength 745 nm

745 nm = 745.10⁻⁹ m

We put in the formula to find this light energy E = h. f

E = h. c / lamda

E =: 6,626.10⁻³⁴. 3.10⁸/745 .10⁻⁹ m

E = 2.67.10⁻¹⁹

The energy of a photon

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The equation E = hf

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the approximate energy of a photon

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The equation for photon energy

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the wavelength of a photon whose energy is twice

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Keywords: photon energy, Planck constant, wavelength, Frequency of electromagnetic waves

i just got this problem. it's 90.3

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).