Electromagnetic SpectrumA series of free High School Chemistry Video Lessons from Brightstorm.
Electromagnetic Spectrum The electromagnetic spectrum depicts different frequencies of electromagnetic radiations shown from blue to red. On the electromagnetic spectrum, wavelength is shown to be increasing to the right and frequency is shown to be increasing to the left. The radiations in the order from blue to red on the electromagnetic spectrum are gamma, X-ray, UV, visible, IR, microwaves and radio waves with gamma being the smallest and radio waves being the biggest.
Photoelectric Effect The photoelectric effect is a tool that we use to determine how much energy electrons have. The photoelectric effect was explained by Albert Einstein in 1905 and states that when light shines on metal in a vacuum, it emits electrons. We are able to determine how much energy electrons have by using the formula Kmax = h(f - f).
Planck's Constant Planck's constant, abbreviated h, is the ratio of photon energy to the frequency. Planck's constant is used in the blackbody radiation spectrum, which indicates that energy is carried by light in discrete amounts. Planck's constant is also used when calculating the photoelectric effect.
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