sodium lamp. Sodium atoms emit light having wavelengths 589.0 nm and 589.6 nm. The interferometer is initially set up with both arms of equal length (i.e., L1 = L2), producing a bright spot at the center of the interference pattern. How far must mirror M2 be moved so that one wavelength has produced one more new maximum than the other wavelength?

You will view a source of white light through a diffraction grating that has 1000 lines/mm. (a) Find the angles that contain the visible spectrum at 1st order. (b) You can’t see the entire spectrum at 2nd order. What is the last wavelength that is visible, assuming you can see out to 90 degrees. What color is that?

Light originating in air is normally incident on a thin film of thickness 150nm with index of refraction n₁ = 1.5 that lies on top of a material with index of refraction n₂ = 1.2, as illustrated. nAir n1 n2 Determine the longest wavelength of light that is maximally reflected. O 450nm O 900nm O 600nm O 300nm

A diffraction grating with unknown number of lines per mm is illuminated by light at a wavelength = 633 nm and the first order diffraction pattern is seen at an angle B = 50.0°. Light of a second wavelength is shone onto the grating, whose second order diffraction pattern is seen at y = 60.0°. What is the wavelength of this second beam? 358 nm 392 nm 716 nm 548 nm 272 nm

A multi-mode fiber optic has a core index of n = 1.492 and a cladding index of 1.489. The diameter of the core is 30.0 microns. Monochromatic light is focused into one end of a perfectly straight fiber which is 25.0 km long. What will be the difference in arrival time at the far end of the fiber for the axial and marginal rays?

A diffraction grating with n = 2.5E-05 lines/nm is used to separate two colors of light. The angle between their first maxima is Δθ ≡ θ1 - θ2 = 0.44 degrees, and the first light has wavelength λ1 = 618 nm.  Part (a)  Find θ1 using n and λ1 in radians.   Part (b)  Find θ2 in radians.  Part (c)  Find the value of the wavelength of the second color λ2 in nm.

The limit to the eye's acuity is actually related to diffraction by the pupil. What is the angle between two just-resolvable points of light for a 7.25 mm diameter pupil, assuming the average wavelength of 554 nm? 0.00534 O angle between two points of light: Take the result to be the practical limit for the eye. What is the greatest possible distance a car can be from a person if he or she can resolve its two headlights, given they are 1.50 m apart? greatest distance at which headlights can be distinguished: m 1.61 Incorrect What is the distance between two just-resolvable points held at an arm's length (0.900 m) from a person's eye? 0.145 distance between two points 0.900 m from a person's eye: m Incorrect