. The photoelectric emission from the surface of a metal starts only when the light incident on the surface has a certain __________. (minimum frequency, minimum wavelength, minimum intensity, minimum speed)

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Sunita Singh

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minimum frequency
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Don't want to over express myself, just join and feel the experience.

minimum frequency
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minimum frequency
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minimum frequency called threshold frequency
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from mathematics to mathemagic

minimum frequency because frequency determines the eenrgy of the photons.
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