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Important Questions: Dual Nature of Matter and Radiation for JEE

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The most important Dual Nature of Matter and Radiation questions for JEE cover conceptual traps, standard results, and numerical patterns from Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations, Einstein's photoelectric equation, particle nature of light, Matter waves: wave nature of particle, de-Broglie relation. Goodmarks provides 31+ high-yield MCQs with full solutions.

Focus on what matters most. These important Dual Nature of Matter and Radiation questions cover high-weightage concepts from Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations, Einstein's photoelectric equation, particle nature of light, Matter waves: wave nature of particle, de-Broglie relation — the topics JEE repeats every year.

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Q1PhysicsUnit 17: Dual Nature of Matter and Radiation
The incident photon involved in the photo-electric effect experiment ν>νo\nu>\nu_{o}
Q2PhysicsUnit 17: Dual Nature of Matter and Radiation
The work function of a substance is 4.0 eVe V. The longest wavelength of light that can cause photo-electric emission from this substance is approximately
Q3PhysicsUnit 17: Dual Nature of Matter and Radiation
The sensor is exposed for 0.1s0.1 s to a 200W200 W lamp 10m10 m away. The sensor has opening that is 20 mm in a diameter How many photons enter the sensor if the wavelength of light is 600 mm? (assume that all the energy of the lamp is given off as light).
Q4PhysicsUnit 17: Dual Nature of Matter and Radiation
The photoelectric effect proves that light consists of:
Q5PhysicsUnit 17: Dual Nature of Matter and Radiation
Work function is
Q6PhysicsUnit 17: Dual Nature of Matter and Radiation
The energy that should be added to an electron to reduce its de-Broglie wavelength from 1 nm to 0.5 nm is.
Q7PhysicsUnit 17: Dual Nature of Matter and Radiation
Assertion Mass of moving photon varies inversely as the wavelength. Reason Energy of the particle == Mass ×\times (speed of light) 2^{2}
Q8PhysicsUnit 17: Dual Nature of Matter and Radiation
In a photoelectric effect, the anode potential is plotted against the plate current

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What makes a Dual Nature of Matter and Radiation question "important" for JEE?

Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

Which subtopics in Dual Nature of Matter and Radiation are high-weightage?

Key areas include Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations, Einstein's photoelectric equation, particle nature of light, Matter waves: wave nature of particle, de-Broglie relation. Prioritise these before moving to edge cases.

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Revise 30–50 important MCQs per unit in the last month before JEE. Focus on questions you got wrong at least once.

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