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Its because the electrons need a minimum amount of energy to come out of the material. This energy is called the threshold energy.

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13y ago

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Why is it when sodium was irradiated for 2 seconds with infrared light no electrons were rejected but when it was irradiated with ultraviolet light thousands of electrons were emitted?

Infrared light does not have sufficient energy to remove electrons from the sodium atoms because the energy of the photons is too low. On the other hand, ultraviolet light carries enough energy to overcome the binding energy of the electrons in the sodium atoms, causing the emission of electrons via the photoelectric effect.


Which has the higher frequencies ultraviolet or infrared?

Ultraviolet light has higher frequencies than infrared light. Ultraviolet light has shorter wavelengths and higher energy compared to infrared light which has longer wavelengths and lower energy.


Higher frequencies ultraviolet waves or infrared waves?

Ultraviolet is higher frequency, then visible light, then infrared.


Where is visible light along the EM spectrum?

Right between infrared and ultraviolet. It has higher frequencies than infrared; lower frequencies than ultraviolet.


What is the opposite of ultraviolet?

infrared


Does infrared or ultraviolet have the shorter wavelength?

UV light has a shorter wavelength than infrared.


What has greater energy between ultraviolet and infrared?

Ultraviolet radiation has greater energy than infrared radiation. Ultraviolet radiation has shorter wavelengths and higher frequencies, while infrared radiation has longer wavelengths and lower frequencies.


Which has the higher frequency infrared light or ultraviolet light?

Ultraviolet light has a wavelength below 400 nanometers, infrared;s wavelength is less than 700 nanometers or so. Frequency is inversely proportional to wavelength, so ultraviolet light has a much a much higher frequency than infrared.


Does an infrared have have more or less energy than an ultraviolet wave?

Infrared waves have far less energy than ultraviolet, being much further down the spectrum.


How do wavelengths of infrared light compared to wavelengths of ultraviolet light?

Infrared light has longer wavelengths compared to ultraviolet light. Infrared light ranges from about 700 nm to 1 mm, while ultraviolet light ranges from about 10 nm to 400 nm. Ultraviolet light has higher energy and shorter wavelengths than infrared light.


What travels at a greater speed ultraviolet light or infrared?

Ultraviolet light travels at a greater speed than infrared light. This is because the speed of light is constant in a vacuum, and different wavelengths of light, such as ultraviolet and infrared, have varying frequencies and energies.


What is the opposite of ultraviolet light?

The opposite of ultraviolet light is infrared light. Infrared light has longer wavelengths and lower frequencies compared to ultraviolet light, which has shorter wavelengths and higher frequencies.