Q26.In an electron microscope, the resolution that can be achieved is of the order of the wavelength of electrons used. To resolve a width of 7.5 × 10−12 m, the minimum electron energy required is close to: (1) 100 keV (2) 25 keV (3) 1 keV (4) 500 keV
What This Question Tests
This question links the de Broglie wavelength required for a certain resolution to the kinetic energy of the electron, involving calculations with Planck's constant and electron mass.
Concepts Tested
Formulas Used
λ = h/p
E_k = p²/(2m)
📚 NCERT Sections This Tests
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📋 Question Details
- Chapter
- Dual Nature of Matter
- Topic
- De Broglie Wavelength
- Year
- 2019
- Shift
- 10 Jan Shift 1
- Q Number
- Q26
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 11: Dual Nature of Radiation and Matter
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