5. The photoelectric effect threshold wavelength for a certain metal is 400 nm. Calculate the maximum speed of photoelectron if the wavelength of the light used is: (a) 300 nm, (b) 400 nm, and (c) 500 nm. (Ans: a: 6 x 10^5 m/s, b: 0, and c: no photoelectron is emitted)
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Given threshold wavelength, λ = 400 nm = 400 x 10^-9 m Show more…
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