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There are materials which absorb photons of shorter wavelength and emit photons of longer wavelength. Can there be stable substances which absorb photons of larger wavelength and emit light of shorter wavelength.
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We know that as the wavelength of photon increase, its frequency decreases or energy increases.
Case first- when the materials which absorb photons of shorter wavelength has the energy of the incident photon on the material is high and the energy of emitted photon is low when it has a longer wavelength.
Case second- the energy of the incident photon is low for the substances which has to absorb photons of larger wavelength and energy of emitted photon is high to emit
light of shorter wavelength. So according to this statement material has to supply the energy for the emission of photons. So, it is not possible for a stable substances material.
Case first- when the materials which absorb photons of shorter wavelength has the energy of the incident photon on the material is high and the energy of emitted photon is low when it has a longer wavelength.
Case second- the energy of the incident photon is low for the substances which has to absorb photons of larger wavelength and energy of emitted photon is high to emit
light of shorter wavelength. So according to this statement material has to supply the energy for the emission of photons. So, it is not possible for a stable substances material.
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