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[Phy] Asking about the definition of photoelectric effect

bakhan.golden

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1^# 大中小發表於 2016-3-22 02:16 AM (第 2948 天) 只看該作者

Asking about the definition of photoelectric effect

Electrons are emitted from the metal surface when electromagnetic radiation of short wavelengths/// long frequency shines on it.

Which is better? Short wavelengths or long frequency?

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antonyluk

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2^# 大中小發表於 2016-3-22 09:51 AM (第 2948 天) 只看該作者

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According to the marking scheme from HKEA, the definition is:
Photoelectric effect involves the emission of electrons from metal surfaces when electromagnetic radiation of high enough frequency falls on them.

btw, we usually use "high/low" to describe frequency . "Short/long" is used to describe wavelength.

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bakhan.golden

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3^# 大中小發表於 2016-3-22 09:30 PM (第 2948 天) 只看該作者

引用:

原帖由 antonyluk 於 2016-3-22 09:51 AM 發表
According to the marking scheme from HKEA, the definition is:
Photoelectric effect involves the emission of electrons from metal surfaces when electromagnetic radiation of high enough frequency falls ...

Do you have the pastpaper of the electives? (atomic world and use of energy/) many thanks !!! ^3^

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