2.21 The mass of an electron is If its K.E. is , calculate its wavelength.
The wavelength of an electron can be found by de Broglie's equation:
Given the K.E. of electron which is equal to .
Hence we get,
Hence the wavelength is given by,
896.7 nm
CBSE Class 12 board exams 2025 to have 50% competency-based questions; no change in 10th
CBSE Class 12 board exams 2024 over; expected result date, trends of last 10 years
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