1. In a Young’s double slit experiment, the slit separation is 0,20 mm and the distance of the screen from the double slit is 1,00 m
a. If the wavelength of light used is 644 nm, calculate the angle separation between two neighboring dark fringes on the screen when viewed from the double slit.
b. When the double slit is substituted with another, the fringes on the screen are just able to be resolved by the eye at the position double slit.
i) If the resolving power of the eye is 3.0 x 10-4 radians, what is the slit separation of the double slit.
ii) Using the double slit in b, explain what modification on the experimental set up that would enable the fringes on the screen to be seen clearly again. Give a quantitative example for your answer. If the screen is then moved further from double slit, describe the change to the fringe pattern. Read the rest of this entry »