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What are the wavelengths for different metals in photoelectric effect?
The wavelengths of light required to cause the photoelectric effect depend on the specific metal. For example, for sodium, the threshold wavelength is around 590 nm, while for potassium it is around 420 nm. Different metals have different work functions, which determine the threshold wavelength needed to eject electrons from their surface.
Does wavelength of the incident rays play a role in the phenomenon of photoelectric effect?
Yes definitely. Reciprocal of wavelength is proportional to frequency as lambda = v /frequency. v - the speed of the wave. The frequency has to be greater than some minimum value known to be the threshold frequency. As frequency increases then kinetic energy of the photo electron also increases. If the frequency of the incident photon is less than the threshold and however higher the intensity, there is no chance of ejection of photo electron right from the surface of the substance. So no photo electric emission is possible.
What is the longest wavelength that can be heard by a normal ear?
The lower frequency limit of human hearing is generally considered to be around 20 Hz.At a speed of sound of 340 meters/sec, that frequency corresponds to a wavelength of(340/20) = 17 meters, in air.
What is the difference between absolute threshold and difference threshold?
absolute threshold is the lowest level that a person will feel sensation differential threshold is the minimal difference that a person can detect between two similar stimuli For example a change in volume in certain frequencies would be crossing the absolute threshold, how much that change would need to be for someone to detect it would be dealing with the difference threshold.
The higher an electromagnetic wave frequency the lower its?
wavelength. This is because frequency and wavelength have an inverse relationship, meaning as frequency increases, wavelength decreases. This relationship is described by the equation speed = frequency x wavelength, where speed is the speed of light in a vacuum.
What are the wavelengths for different metals in photoelectric effect?
The wavelengths of light required to cause the photoelectric effect depend on the specific metal. For example, for sodium, the threshold wavelength is around 590 nm, while for potassium it is around 420 nm. Different metals have different work functions, which determine the threshold wavelength needed to eject electrons from their surface.
At what wavelength value does potassium stop emitting electrons when it is flashed with light?
The work function of potassium is 2.26 eV. Therefore a light wavelength must be at least 2.26 times 1.6 times 10 to the negative 19th power J to remove electrons.
When was From Threshold to Threshold created?
From Threshold to Threshold was created in 1955.
What is a antonym of threshold?
anti-threshold
Does wavelength of the incident rays play a role in the phenomenon of photoelectric effect?
Yes definitely. Reciprocal of wavelength is proportional to frequency as lambda = v /frequency. v - the speed of the wave. The frequency has to be greater than some minimum value known to be the threshold frequency. As frequency increases then kinetic energy of the photo electron also increases. If the frequency of the incident photon is less than the threshold and however higher the intensity, there is no chance of ejection of photo electron right from the surface of the substance. So no photo electric emission is possible.
What rhymes with threshold?
There are no perfect rhymes for threshold.
Threshold of human in db?
The threshold of hearing is 0 dB. The threshold of pain = 137.5 dB.
How do you spell theshhold?
threshold - After the wedding ceremony he carried her over the threshold of their new home.
How to install a threshold on concrete?
To install a threshold on concrete, first measure and mark the placement of the threshold. Use a drill to create holes in the concrete where the threshold will be installed. Insert anchors into the holes and secure the threshold in place using screws. Make sure the threshold is level before tightening the screws.
What is the meaning of threshold?
Threshold is the entrance or beginning point of something.
What is threshold of goods or services?
A threshold of a good or service is the threhold
When was Threshold Editions created?
Threshold Editions was created in 2005.
