Its because the electrons need a minimum amount of energy to come out of the material. This energy is called the threshold energy.
This statement is incorrect. Infrared rays have a longer wavelength than ultraviolet rays. Infrared rays have wavelengths longer than visible light, while ultraviolet rays have wavelengths shorter than visible light.
The frequency of visible light falls between ultraviolet and infrared light on the electromagnetic spectrum. It has wavelengths ranging from approximately 400 to 700 nanometers.
They are infrared waves! ^__^
Yes, electromagnetic radiation in the ultraviolet region represents a larger energy transition than radiation in the infrared region. This is because ultraviolet radiation has higher frequency and shorter wavelength compared to infrared radiation, leading to higher energy photons.
Microwaves <><><><><> Ultraviolet, infrared, gamma.
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.
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.
Ultraviolet is higher frequency, then visible light, then infrared.
Right between infrared and ultraviolet. It has higher frequencies than infrared; lower frequencies than ultraviolet.
infrared
UV light has a shorter wavelength than 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.
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.
Infrared waves have far less energy than ultraviolet, being much further down the spectrum.
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.
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.
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.