# 1. Two narrow slits separated by 1.5 mm are illuminated by light of wavelength 600 nm,and the interference pattern is viewed on a screen 1.2 m away. Calculate the number ofbright fringes per centimeter on the screen.2. A diffraction grating has 5, 400 lines per cm. (a) What range of angles do the visiblewavelengths (400 – 700 nm) span in second order maxima? (b) What is the width (in cm)of the resulting second order spectrum on a screen placed 1.5 m away?3. If you can read the bottom row of your doctor's eye chart, your eye has a resolving powerof one arcminute, equal to degree. If this resolving power is diffraction limited, to whateffective diameter of your eye's optical system does this correspond? Use Raleigh's criterionand assume A = 550 nm.4. The direction of polarization of linearly polarized light is rotated through 90°, using twoPolaroid filters. The first filter's polarization axis makes an angle of 20° with the incominglight's polarization direction. The second filter further rotates the light by 70º. By howmuch is the intensity reduced?5. The polarizing angle for a certain substance is 63.4° (i.e., for a ray travelling from airinto the substance) (a) What is the angle of refraction of light incident at this angle? (b)What is the index of refraction of this substance?

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Asked Feb 3, 2020
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Please help with question #3. Thank you.

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## Expert Answer

Step 1

The Rayleigh criterion for vision that is diffraction...

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