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Dual Nature of Radiation and Matter-CBSE Class 12th NCERT Solution

Aug 31, 2013 04:36 IST

    Get, detailed solutions to the questions of the chapter Dual Nature of Radiation and Matter from NCERT textbooks. The objective is to helping students regarding the pattern of answering the question as per the cbse latest marking scheme. Cbse.jagranjosh.com provided you NCERT solutions for classes 12th math and science subjects.

    Some questions of this chapter are given here.

    Q. The photoelectric cut-off voltage in a certain experiment is 1.5 V.What is the maximum kinetic energy of photoelectrons emitted?

    Q. The energy flux of sunlight reaching the surface of the earth is1.388 × 103 W/m2. How many photons (nearly) per square metre are incident on the Earth per second? Assume that the photons in the sunlight have an average wavelength of 550 nm.

    Q. In an experiment on photoelectric effect, the slope of the cut-offvoltage versus frequency of incident light is found to be 4.12 × 10–15 V s. Calculate the value of Planck’s constant.

    Q. The threshold frequency for a certain metal is 3.3 × 1014 Hz. If light of frequency 8.2 × 1014 Hz is incident on the metal, predict the cut-off voltage for the photoelectric emission.

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