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In a photo-emissive cell, with exciting wavelength λ , the maximum kinetic energy of electron is K. If theexciting wavelength is changed to 3 λ/4 the kinetic energy of the fastest emitted electron will be: (A) 3K/4 (B) 4K/3 (C) less than 4K/3 (D) greater than 4K/3

In a photo-emissive cell, with exciting wavelength λ, the maximum kinetic energy of electron is K. If theexciting wavelength is changed to 3λ/4 the kinetic energy of the fastest emitted electron will be: (A) 3K/4 (B) 4K/3 (C) less than 4K/3 (D) greater than 4K/3

Grade:12

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