Light: Quantum Model (HSC SSCE Physics): Flashcards
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Practise the cards
10 cards from this deck
Who discovered photoelectric effect & when?
Who discovered photoelectric effect & when?
Heinrich Hertz in 1887
What is the photoelectric effect?
What is the photoelectric effect?
Light striking metal emits electrons
What is cut-off frequency ()?
What is cut-off frequency ()?
Min frequency needed for photocurrent
Effect of light intensity on photocurrent?
Effect of light intensity on photocurrent?
Higher intensity → more photoelectrons
Time delay in photoelectron emission?
Time delay in photoelectron emission?
None - instantaneous
What is stopping voltage ()?
What is stopping voltage ()?
Voltage stopping all photoelectrons
Formula: max kinetic energy from ?
Formula: max kinetic energy from ?
What is work function?
What is work function?
Min energy to remove electron from metal surface
Why quartz window vs glass?
Why quartz window vs glass?
Quartz allows UV; glass absorbs it
Classical vs actual: light below ?
Classical vs actual: light below ?
Classical: emission possible. Actual: none