use x=n ?1D/d
114) A parallel beam of light of wavelength 500 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1 m away. It is observed that the first minimum is at a distance of 2.5 mm from the centre of the screen. Find the width of the slit.
Answer is:
0.2 nm
Explanation:
Related Optics MCQ with Answers
Answer is:
39.4?
Explanation:
Join the point of incidence (call it A) to the mid point of the second mirror (call it B) Let the corner point be called C. Once you join A and B you know that: tan ?BAC = 14/11.5 = 1.2174 ? ?BAC = tan ?? (1.2174) = 50.6 ? Angle of incidence is angle made with the normal at the point of incidence = (90 - 50.6) = 39.4 ? Angle of incidence at the first mirror will this ray strike the midpoint of the second mirror (which is 28.0cm long) after reflecting from the first mirror = 39.4 ?
Answer is:
9I and I
Explanation:
By I(max) = I1 + I2 + 2?I1 x I2 =>I(max) = 0.I + 0.4I + 2?(0.I x 0.4I) =>I(max) = 0.9I By I(min) = I1 + I2 - 2?I1 x I2 =>I(min) = 0.I + 0.4I - 2?(0.I x 0.4I) =>I(min) = 0.I
Answer is:
I0/4
Explanation:
the positions of minimum intensity will not be completely dark is I0/4
Answer is:
using white light instead of monochromatic light
Explanation:
In a young's double slit experiment, the central bright fringe can be identified by using white light instead of monochromatic light