Physics
Dual nature for JEE Main & Advanced — photons and de Broglie
How photoelectric and matter waves link atomic structure to modern physics questions on both papers.
On JEE Main
Main tests the photoelectric equation, stopping potential vs frequency graphs, threshold frequency vs intensity misconceptions, and de Broglie wavelength comparisons for particles. Most traps exploit confusing intensity with frequency for photons.
On JEE Advanced
Advanced blends this chapter with atomic structure in paragraph-based formats: a radiation source ionises a gas, and students must use both photoelectric reasoning and Bohr model energy levels in the same question. Integer-type problems use wavelength-momentum-energy relationships.
How to practise
Practise Dual Nature on PracticeJEE as short revision sets before mixed modern physics tests.
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