In monochromatic red light a blue book will probably appear to be_________________? A. black B. purple C. green D. no scientific reasoning available

Which one of the following cannot be polarized ? A. radio waves B. ultraviolot rays C. X-raysD. sound waves

In a plane polarized light _________________? A. vibration in all direction B. vibration in two mutually perpendicular directionsC. vibration take place in a direction perpendicular to the direction of propagation of light D. no vibration at all

Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________? A. 4 x 10-10 mB. 2 x 10-10 m C. 0.02×10-10m D. 20×10-10m

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 nmB. 5000A C. 500m D. 2000um

The blue colour of the sky is due to___________________? A. diffraction B. reflection C. polarizationD. scattering

In an interference pattern______________________? A. bright fringes are wider than dark fringes B. dark fringes are wider than bright fringeC. both dark and bright fringes are of equal width D. central fringes are brighter than the outer fringes

In Young double slit experiment, if white light is used____________________? A. alternate dark and bright fringes will be seenB. coloured fringes will be seen C. no interference fringes will be seen D. impossible to predict

When crest of one wave falls over the trough of the other wave this phenomenon is known as________________? A. polarization B. constructive interferenceC. destructive interference D. diffraction

Which one of the following is nearly monochromatic light ? A. light form fluorescent tube B. light form neon lampC. light form sodium lamp D. light form simple lamp