Entry Test MCQ :: Physical Optics

1.  Optical active crystals rotates the
A. vibrating plane B. polarization plane
C. diffraction plane D. interference plane

2.  Which is not optically active?
A. sugar B. tartaric acid
C. water D. sodium chlorate

3.  In double slit experiment we observe
A. interference fringes only B. diffraction fringes only
C. both interference and diffraction fringes D. polirized frringes

4.  When light incident normally on thin film the path difference depends upon
A. thickness of the film only B. nature of the film only
C. angle of indidence only D. all thickness nature and angle of incidence

5.  Which one of the following properties of light does not change with the nature of the medium?
A. velocity B. wavelength
C. amplitude D. frequency

6.  Light reaches the earth form sun in nearly
A. 15 minutes B. 10 minutes
C. 8 minutes D. 8 minutes 30 seconds

7.  Photoelectric effect was given by
A. Hertz B. Fresnel
C. Einstein D. Plank

8.  According to Einstein light travels form one place to another in the form of
A. waves B. particles
C. photons D. it was not his discovery

9.  Longitudinal waves do not exhibit
A. reflection B. refraction
C. diffraction D. polarization

10.  Central spot of Newtons rings
A. bright B. dark for large wavelength
C. dark D. bright for large wavelength

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