NEET PhysicsNCERT Class 12Dual Nature of Matter and Radiation

Dual Nature of Radiation and Matter: NEET questions with solutions

NEET tests photon energy in eV, Einstein's photoelectric equation, what intensity and frequency each control, reading threshold frequency and work function off a stopping-potential graph, photon flux from a beam's power, and de Broglie wavelengths of electrons and protons. Marks are lost by letting intensity raise the stopping potential, by mixing joules and electronvolts, and by forgetting that a lighter particle with the same kinetic energy has the longer wavelength.

Revise first: NCERT notes for Dual Nature of Radiation and Matter

Questions

10 questions · answers after you pick

1A green laser pointer emits light of wavelength 500 nm. What is the energy of one photon of this light, in electronvolts? (Take hc = 1240 eV…Particle nature of light: the photonEasySingle correct 2Monochromatic light above the threshold frequency falls on a photocell. The intensity is doubled while the frequency is kept the same. What…Effect of intensity on photocurrentEasySingle correct 3Light of wavelength 400 nm falls on a metal surface whose work function is 2.3 eV. What is the stopping potential for the emitted…Einstein's photoelectric equationMediumSingle correct 4A red laser of wavelength 660 nm delivers a beam of power 3.0 mW. About how many photons does it emit per second? (h = 6.63 × 10⁻³⁴ J s, c =…Particle nature of light: the photonMediumSingle correct 5An electron and a proton are each accelerated until they have the same kinetic energy. Roughly what is the ratio of the electron's de…Wave nature of matterMediumSingle correct 6A student measures the stopping potential for one metal at two frequencies: 1.2 V at 8.0 × 10¹⁴ Hz and 2.0 V at 1.0 × 10¹⁵ Hz. Using only…Einstein's photoelectric equationHardSingle correct 7A beam of monochromatic ultraviolet light is passed through a region with a strong electric field and then into a gas. Which of these…Particle nature of light: the photonMediumStatement based 8A photocell is lit by extremely faint light above its threshold frequency, and a current starts to flow at once. Read the Assertion (A) and…Photoelectric effect and wave theory of lightMediumAssertion–Reason 9For an electron-diffraction experiment, electrons must have a de Broglie wavelength of 0.20 nm. What kinetic energy must each electron have?…Wave nature of matterHardSingle correct 10Match each item in List I with what supplies or describes it in List II.Electron emissionEasyMatch the following

© 2026 Lumi (Aikolumi Software Pvt Ltd). Original questions written by Lumi. Free to view and practise on this site. Copying, republishing or reproducing these questions, options or solutions, in print or online, is not permitted.

Practising is step one. Knowing what to practise next is the hard part.

The Lumi app tracks every answer, finds the concepts you're losing marks on, and schedules your revision with FSRS before you forget.

Start learning free