Chapter 9: Optics – Interference, Diffraction & Polarization (Set-3)

Diffraction of light is more pronounced when

Fraunhofer diffraction refers to

Fresnel diffraction refers to

In single-slit Fraunhofer diffraction, minima occur when

The central maximum in single-slit diffraction is

Intensity in single-slit diffraction pattern is proportional to

In single-slit diffraction, β =

Condition for principal maxima in single-slit diffraction is

If slit width decreases in single-slit diffraction, the central maximum

Diffraction effects dominate when

Double-slit diffraction pattern is

In double-slit diffraction, fringe visibility decreases when

In diffraction gratings, principal maxima occur at

Grating resolving power is given by

Diffraction grating gives very sharp maxima because

In Fresnel diffraction, the shape of fringes depends on

Fresnel zones are

A zone plate focuses light due to

A zone plate behaves like

In zone plate, the radii of zones follow

Diffraction through circular aperture results in

Angular resolution of a telescope (Rayleigh criterion) is

Reducing aperture diameter does what to resolution?

The resolving power of a grating increases with

Missing orders occur in double-slit diffraction when

Intensity at the central maximum of a single slit is approximately

Grating spacing d decreases when

For equal slit widths, diffraction envelope depends on

In multiple-slit diffraction, principal peaks become

Half-period zones in Fresnel theory contribute

Obstructing alternate Fresnel zones (zone plate idea)

In single-slit diffraction, if wavelength increases, the diffraction pattern

For a given aperture, shorter wavelengths give

The grating element (d) is

A transmission grating works due to

In Fresnel diffraction at straight edge, fringes are

Fraunhofer diffraction uses

The first minima in circular aperture diffraction occurs at angle satisfying

The energy in diffraction pattern is

In multi-slit interference, secondary maxima

The free spectral range of a grating is

A zone plate exhibits

Higher orders in diffraction grating appear at

If grating is illuminated with white light, different wavelengths

Diffraction efficiency depends strongly on

Fresnel’s half-period theory explains

In single-slit diffraction, if slit width doubles, width of central maximum

Zone plate focal length decreases when

Grating with 600 lines/mm has grating spacing

A circular aperture produces