Electron Microscope Resolution
Electron microscopes achieve higher resolution due to electrons having:
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About This Question
- Subject
- physics
- Chapter
- dual nature of radiation and matter
- Topic
- electron microscope resolution
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Shorter de Broglie wavelength
Resolving power is inversely proportional to the wavelength of the 'probe' used.
- Visible light has wavelengths of ∼400−700 nm, limiting resolution to ∼200 nm.
- Fast-moving electrons have a de Broglie wavelength (λ=h/p) that can be 100,000 times shorter than visible light.
- This drastically increases the Resolving Power, allowing us to see details at the atomic scale.
This medium difficulty physics question is from the chapter dual nature of radiation and matter, covering the topic of electron microscope resolution. It appeared in the 2025 exam.
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