Homework Help: physics

Posted by lili on Thursday, May 31, 2012 at 3:57pm.

A metallic surface emits photo electrons when green light falls on it. But the metal does not emit when yellow light falls on it. Which of the following is correct when red light falls on the metallic surface?

physics - bobpursley, Thursday, May 31, 2012 at 4:29pm
If yellow does not exceed the threshold, red certainly wont.

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