A small aperture is illuminated with a parallel beam of `lambda = 628 nm`. The emergent beam has an anglur divergence of `2^(@)`. The size of the aperture is

A small aperture is illuminated with a parallel beam of lambda= 628 nm . The emergent beam has an angular divergence of 2^0 . The size of the aperture is

For an aperture of size a illuminated by a parallel beam of light having wavelength 1, the Fresnel distance is:

For an aperture of size a illuminated by a parallel beam of light having wavelength 1, the Fresnel distance is:

A linear aperture whose width is 0.02 em is placed immediately in front of a lens of focal length 60 cm. The aperture is illuminated normally by a parallel beam of wavelength 5 xx 10^(-5) cm . The distance of the first dark band of the differation pattern from the centre of the screen is .......

A screen with linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm The aperture is illuminated normally by a parallel beam of wavelength 5xx10^-5 cm.The distance of the first dark band of the diffraction pattern from the centre of the screen is.

A linear aperture whose width is 0.02cm is placed immediately in front of a lens of focal length 60cm . The aperture is illuminated normally by a parallel beam of wavelength 5xx10^-5cm . The distance of the first dark band of the diffraction pattern from the centre of the screen is

A linear aperture whose width is 0.02cm is placed immediately in front of a lens of focal length 60cm . The aperture is illuminated normally by a parallel beam of wavelength 5xx10^-5cm . The distance of the first dark band of the diffraction pattern from the centre of the screen is

A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60cm. The aperture is illuminated normally by a parallel beam of wavelength 5xx10^(-5) cm. The distance of the first dark band of the diffraction pattern from the centre of the screen is