طبعی بصریات

Interference of light provides evidence that light behaves as a:

• 1 Wave
• 2 Particle
• 3 Neutral object
• 4 Sound

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

• 1 Wavelength
• 2 Intensity
• 3 1 / wavelength
• 4 Slit width only

Polarisation shows that light waves are:

• 1 Transverse
• 2 Sound like
• 3 Longitudinal
• 4 Neutral

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

• 1 5 x 10⁻³ m
• 2 2 x 10⁻⁶ m
• 3 5 x 10⁻⁶ m
• 4 2 x 10⁻⁴ m

Newton's rings are produced by:

• 1 Polarisation
• 2 Dispersion
• 3 Reflection only
• 4 Thin film interference

The wavelength of visible light is of the order of:

• 1 1 m
• 2 10⁻⁷ m
• 3 10⁻² m
• 4 10³ m

A diffraction pattern is clearest when the slit width is:

• 1 Infinite
• 2 Comparable to the wavelength
• 3 Zero
• 4 Much larger than the wavelength

Light is polarised when its vibrations are:

• 1 Zero
• 2 Circular only
• 3 Random
• 4 Restricted to one plane