The speed of light will be minimum while passing through ?

Related Mcqs:

1. Light on passing through a Polaroid is ___________________?

   A. plane polarized
   B. un-polarized
   C. circularly polarized
   D. elliptically polarized

2. A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?

   A. center of curvature
   B. focus
   C. optical center
   D. aperture

3. 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

4. If a material object moves with speed of light its mass becomes ________________?

   A. equal to its rest mass
   B. double of its rest mass
   C. infinite
   D. zero

5. 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

6. Michelson calculated the speed of light using the instruments______________?

   A. spectrometer
   B. galvanometer
   C. interferometer
   D. none of these

7. If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________?

   A. 4 rad. S-1
   B. 5 rad. S-1
   C. 1.6 rad. S-1
   D. 2.8 ms-1

8. A train is moving with a speed of 100mph. What will be its speed in m/s.?

   A. 45 m/s
   B. 90 m/s
   C. 100 m/s
   D. 120 m/s

   Submitted by: Zahid Jagirani

9. In Young double slit experiment, if white light is used____________________?

   A. alternate dark and bright fringes will be seen
   B. coloured fringes will be seen
   C. no interference fringes will be seen
   D. impossible to predict

10. After traveling through a vacuum a photon of light entering into some transparent denser medium. Thus the energy of light______________?

    A. Increases because wavelength decreases
    B. Decreases because speed decreases
    C. Remains same
    D. Increases then decrease