14. If the photon is travelling towards earth, from a regionwith lower gravitation, the shift will be towards a _______ in thewavelength.
a. Increase
b. Decrease
c. No change
d. None of the above
15. Gravitational waves carry energy and momentum, travel at aspeed
a. Slower than that of light
b. Faster than that of light
c. Same speed of light
d. None of the above
16. Gama rays can be considered as _____
a. Wave
b. Particles
c. Both particles and waves
d. None of the above
17. By considering the electromagnetic radiations are particles,we can explain the following properties
a. Reflection
b. Refraction
c. Interference
d. Diffraction
18. In Young’s double slit experiments, the central fringe isalways
a. Bright
b. Dark
c. Bright or dark depends on the length between screen andslits
d. Bright or dark depends on the length between slits
19. According to Stefan’s law total radiant heat energy emittedfrom a source is proportional to
a. T4
b. 1/T4
c. T2
d. 1/T2
