What Is The Maz Wavelength Of Light That Can Remove An Electron From Silver Metal?

What is the maximum wavelength of light that can remove an electron from an atom on the surface of lithium metal?

The maximum wavelength of light that can remove an electron from a lithium atom is equal to 4.279⋅10−7m. So, you know that the work function of lithium, which is the energy needed to remove an electron from an atom located at the surface of the metal, is equal to 279.7 kJ/mol.

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How do you calculate the wavelength needed to remove an electron?

If a photon has enough energy, it can completely remove an electron from an atom or molecule. In this video, we’ll use the light equations (E = h and c = ) to calculate the longest photon wavelength capable of removing an electron from a single atom of silver.

What is the maximum wavelength of light that is needed to free an electron from the surface of Potasssium metal?

You can thus say that in order for an electron to be ejected from the surface of potassium, the incoming photon must have a maximum wavelength of 543 nm. If the wavelength of the incoming photon is longer than this value, then you won’t see an emission of electrons from the surface of the metal.

What is the longest wavelength of light required to remove an electron from the surface of potassium metal by the photoelectric effect if the binding energy of an electron is 1.76 103 kJ mol?

Answer: The wavelength of light is 68 nm.

What is the minimum frequency required to remove an electron from metallic potassium?

The threshold frequency for potassium metal is: This means that light with a minimum frequency of 5.584 × 1014 Hz is needed to remove an electron from the potassium metal. Blue light is above this frequency which means it will trigger the photoelectric effect.

What is the longest wavelength of light that will cause the ejection of electrons?

The longest wavelength of light that will cause an electron to be emitted from a metal is 520 nm.

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What are the 7 wavelengths?

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.

Which Colour has more wavelength?

In the visible spectrum red to violet, red has the highest wavelength [650 nm] as well as the lowest frequency.

What is the maximum wavelength of light?

As the full spectrum of visible light travels through a prism, the wavelengths separate into the colors of the rainbow because each color is a different wavelength. Violet has the shortest wavelength, at around 380 nanometers, and red has the longest wavelength, at around 700 nanometers.

What is the threshold frequency?

: the minimum frequency of radiation that will produce a photoelectric effect.

How do you find the threshold frequency of a metal?

The formula of threshold frequency is W= hv. Here v is the photoelectric threshold frequency of the electromagnetic light rays, W is the work function of the metal body.

What are the units of H in the equation E HF?

The units of the energy equation, E = h f, are traditionally written as [J s 1/s] where units of frequency, f, are [1/s] (cycles per second or Hertz), and the units of Planck’s constant, h, are [J s], or the units of action.

What is the minimum frequency of light needed to remove an electron from chromium?

In discussions of the photoelectric effect, the minimum energy needed to remove an electron from the metal is called the threshold energy and is a characteristic of the metal. For example, chromium, Cr, will emit electrons when the wavelength of the radiation is 284 nm or less.

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What is the longest wavelength of energy capable of ejecting an electron from potassium?

This works out to 554 nanometers; that is the maximum wavelength that will eject an electron from a potassium molecule, or atom, I should say.

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