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Class XII Physics Dual Nature of Radiation & Matter 2
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Question 1
In Moseley’s law for characteristic X-rays is √ν = a(Z – b)
Question 2
Which of the following radiations has the least wavelength?
Question 3
For what condition wave speed in sine wave is greater than the particle speed
Question 4
A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of the following statements is correct ?
Question 5
Electrons of mass m with de- Broglie wavelength λ fall on the target in an X-ray tube. The cut off wavelength (λo)of the emitted X-ray is
Question 6
The work function of sodium is 2.3 eV. The threshold wavelength of sodium will be
Question 7
A laser device produces amplification in the_____.
Question 8
If an electron accelerated through a potential difference of 500 volt attains a speed of 1.33 × 107 m s–1 then specific charge of the electron should be
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Dec 13NEET & AIIMS
