Light and Quantized Energy

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Electromagnetic radiation Noun

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[eh-lek-tro-mag-net-ik ray-dee-ay-shun]

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Wavelength Noun

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[wayv-length]

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Frequency Noun

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[free-kwen-see]

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Hertz Noun

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[hurts]

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Hertz

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The SI unit of frequency, which is equivalent to one wave or cycle passing a point per second.

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Amplitude Noun

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[am-pli-tood]

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Electromagnetic spectrum Noun

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[eh-lek-tro-mag-net-ik spek-trum]

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Quantum Noun

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[kwon-tum]

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Planck's constant Noun

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[planks kon-stunt]

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Planck's constant

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A fundamental physical constant used to calculate the energy of a quantum, with a value of 6.626 × 10⁻³⁴ J·s.

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Photoelectric effect Noun

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[foh-toh-ee-lek-trik uh-fekt]

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Photoelectric effect

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The emission of electrons from a metal's surface when light of a certain minimum frequency shines on it.

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Photoelectron Noun

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[foh-toh-ee-lek-tron]

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Photoelectron

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An electron that is emitted from a metal's surface as a direct result of the photoelectric effect.