طبعی بصریات

Written by Dr. Hamza Farooq (Physics)

گیارہویں جماعت · طبیعیات · 8 سوالات

نام: ____________________   تاریخ: ____________

1. Interference of light provides evidence that light behaves as a:

   • A Wave
   • B Particle
   • C Neutral object
   • D Sound

2. In Young's double slit experiment, the fringe spacing is proportional to:

   • A Wavelength
   • B Intensity
   • C 1 / wavelength
   • D Slit width only

3. Polarisation shows that light waves are:

   • A Transverse
   • B Sound like
   • C Longitudinal
   • D Neutral

4. A diffraction grating has 5000 lines per cm. The grating spacing is:

   • A 5 x 10⁻³ m
   • B 2 x 10⁻⁶ m
   • C 5 x 10⁻⁶ m
   • D 2 x 10⁻⁴ m

5. Newton's rings are produced by:

   • A Polarisation
   • B Dispersion
   • C Reflection only
   • D Thin film interference

6. The wavelength of visible light is of the order of:

   • A 1 m
   • B 10⁻⁷ m
   • C 10⁻² m
   • D 10³ m

7. A diffraction pattern is clearest when the slit width is:

   • A Infinite
   • B Comparable to the wavelength
   • C Zero
   • D Much larger than the wavelength

8. Light is polarised when its vibrations are:

   • A Zero
   • B Circular only
   • C Random
   • D Restricted to one plane