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

Related Mcqs:

1. If a body a mass of 2 kg is raised vertically through 2m, then the work done will be _________________?

   A. 38.2 J
   B. 392.1 J
   C. 39.2 J
   D. 3.92 J

2. 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

3. 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

4. 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

5. 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

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

   A. The maximum kinetic energy of the photoelectrons increases
   B. The minimum kinetic energy of the photoelectrons decreases
   C. The minimum kinetic energy of the photoelectrons increases
   D. The average kinetic energy of the photoelectrons decreases

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. Gives the definition of metre in terms of wavelength of red cadmium light ___________________?

   A. Newton
   B. Einstein
   C. Michelson
   D. Galileo

10. What is wavelength of visible spectrum?

    A. 8500 – 9800 angstrom
    B. 7800 – 8000 angstrom
    C. 3900 – 7600 angstrom
    D. 1300 – 3000 angstrom

    Submitted by: Engr Allah Wadhayo