1.

A linear aperture whose width is 0.02 cm us placed immediately in front of a lens of focal length 60 cm

Answer»

Please question complete kro.....

A 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 5 x 10-5cm. The distance of the FIRST dark band of the diffraction pattern from the CENTRE of the screen is:



f= D = 60cm

for first minima

y = wavelength * D / a

y = 5 x 10-5 * 60 / 0.02 = 0.15 cm


Discussion

No Comment Found

Related InterviewSolutions