If the wavelength of incident radiation is increased in photoemission then_________________?

Related Mcqs:

1. In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?

   A. Becomes double
   B. Remains same
   C. Becomes half
   D. First increases then decrease because of the curvilinear graph

2. Radiation with wavelength longer than red lights______________?

   A. ultraviolet rays
   B. X-rays
   C. infra red radiation
   D. visible radiation

3. The linear momentum of an X-ray photon of wavelength 0.1A is_______________?

   A. 6.625x1023N-s
   B. 66.25x1023N-s
   C. 662.5x1023N-s
   D. data is insufficient

4. As the temperature of black body is raised the wavelength corresponding to maximum intensity________________?

   A. shifts towards longer wavelength
   B. shifts towards shorter wavelength
   C. remain the same
   D. shifts towards longer as well as shorter wavelengths

5. In Compton scattering, the change in wavelength is maxed if_______________?

   A. The angle of scattering is 90°
   B. The angle of scattering is 60°
   C. The angle of scattering is 180°
   D. The angle of scattering is 0

6. A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?

   A. λ
   B. Speed of sound
   C. Speed of lightB.
   D. h

7. A photon of wavelength 900nm behaves like a particle of mass______________?

   A. 5.53 x 10-36kg
   B. 0 kg.
   C. 2.46 x 10-36kg
   D. 1.84 x 10-44kg

8. The velocity of a particle of mass m of de-Broglie wavelength λ is______________?

   A. v = 3 ×× 106 ms-1
   B. v = 2 ×× 10 ms-1
   C. v = 2 ×× 6 ms-1
   D. v = 2 ×× 106 ms-1

9. When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?

   A. 5000 nm
   B. 5000A
   C. 500m
   D. 2000um

10. The distance between any two consecutive nodes or antinodes in a stationary wavelength (λ) is _________?

    A. λ
    B. λ/2
    C. λ/4
    D. λ/8

    Submitted by: Rizwan Ayub Saadi