PHYS 52 sample EXAM 2_2

PHYS 52 sample EXAM 2_2 - by light of l = 600 nm....

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SAN JOSE STATE DEPARTMENT OF PHYSICS PHYS 52          CLOSED BOOK SAMPLE MIDTERM 2    SHOW ALL WORK                 SPRING 2010 1. A pair of narrow slits, separated by 1.80 mm, is illuminated by a  monochromatic light source. An interference pattern is observed on a  screen 4.80 m from the slits. If there are 5 bright fringes per cm on  the screen determine the wavelength of the light. (nm) 2. A film of oil with n = 1.40 on glass with an index of refraction of 1.55  is sitting in air. Light is incident on the oil. a) If for visible light only  λ  = 560 nm is strongly reflected determine  the minimum thickness of the film. (nm) b) For visible light which  l would be least reflected. (nm) Note: For visible light  λ = 350-700 nm  3. A single slit, 1500 nm wide forms a diffraction pattern when illuminated 
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Unformatted text preview: by light of l = 600 nm. Determine: a) The largest angle from the central maxima at which the intensity is zero. () b) At an angle of 10 from the central maximum the ratio of the intensity to that of the central maximum. 4. A 4500-rulings/cm grating is 3.60 cm wide. If light with wavelength of 500 nm illuminates the grating determine: a) The smallest wavelength interval ( ) that can be resolved in order 2. (nm) b) The angular position of the largest-order maximum 5. Let the diameter of your eye have a diameter of 3.5mm. Light of wavelength 500 nm is used to view two point sources 281 m from your eye. How far apart must the two sources be if they are to be just resolved by your eye. (m)...
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