The thresold wavelength for sodium is 5x...

The thresold wavelength for sodium is `5xx10^(-7) m`. Photoemission occurs for light of

Wavelenght of `6 xx 10^(-7)` m and above

Wavelenght of ` 5 xx 10^(-7)` m and below

Any wavelenght

All frequencies below `5 xx 10^(14)` Hz

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NARAYNA-DUAL NATURE OF RADIATION AND MATTER-C. U. Q

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