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10th Class Science Sources of Energy Question Bank Sources of Energy

  • question_answer
    A metallic surface ejects photoelectrons when hit by green light but none when hit by yellow light. Will the electrons be ejected if the same surface is hit by red light?

    A)  yes

    B)  yes, if the red beam is sufficiently intense  

    C)  can?t say

    D)  none of these

    Correct Answer: B

    Solution :

    Not Available


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