A flat piece of glass is held stationary and horizontal above the highly polished, flat top end of a 9.00-cm-long vertical metal rod that has its lower end rigidly fixed. The thin film of air between the rod and glass is observed to be bright by reflected light when it is illuminated by light of wavelength 515 nm. As the temperature is slowly increased by 25.5°C, the film changes from bright to dark and back to bright 200 times. What is the coefficient of linear expansion of the metal?

An extremely thin sheet of glass is being inspected at the camera store. Illuminated by white light at near-normal incidence, the film-like sheet is 0.415 µm thick and has air on both sides. If the glass has a refractive index of 1.52, what wavelength of visible light (in nm) does it reflect most strongly? (The wavelengths of visible light range from 400 to 700 nm.)

The pupil of an eagle’s eye has a diameter of 6.0 mm. Two field mice are separated by 0.010 m. From a distance of 202 m, the eagle sees them as one unresolved object and dives toward them at a speed of 15 m/s. Assume that the eagle’s eye detects light that has a wavelength of 550 nm in vacuum. How much time passes until the eagle sees the mice as separate objects?

A broad beam of light of wavelength 527 nm is sent directly downward through the glass plate (n = 1.46) in Figure (a). That plate and a plastic plate (n = 1.17) form a thin wedge of air that acts as a thin film. An observer looking down through the top plate sees the fringe pattern shown in Figure (b), with dark fringes centered on the ends. (a) What is the thickness (in m) of wedge at the right end? (b) How many dark fringes will the observer see if the air between the plates is replaced with a liquid with n = 1.26? Incident light (a) Number (b) Number i Units Units (a) (b)

For light with 1 = 10-6 m what is the thickness of a coating with n = 1.225 that reduces normal incidence reflection from glass (nGlass =1.5) to zero? O 2.5 x 10-7 m O None of these O 4.08 x 10-7 m O 2.04 x 10 7 m O 8.16 x 10 7 O 3.33 x 10 7 m O 5 x 10 7 m

The pupil of an eagle's eye has a diameter of 6.0 mm. Two field mice are separated by 0.010 m. From a distance of 197 m, the eagle sees them as one unresolved object and dives toward them at a speed of 20 m/s. Assume that the eagle's eye detects light that has a wavelength of 550 nm in vacuum. How much time passes until the eagle sees the mice as separate objects? t= i

You are conducting a single-slit diffraction experiment with light of wavelength l. What appears, on a distant viewing screen, at a point at which the top and bottom rays through the slit have a path length difference equal to (a) 5l and (b) 4.5l?

An optical coating with an index of refraction of 1.23 is applied to glass with an index of refraction of 1.50. If the thickness of this coating is 184nm, what wavelength(s) of visible light in air are most strongly reflected from this surface? Visible wavelengths range from 350nm to 700nm.

Monochromatic light of wavelength 461 nm from a distant source passes through a slit that is 0.0310 mm wide. In the resulting diffraction pattern, the intensity at the center of the central maximum (θ = 0o) is 1.00×10−4 W/m^2. What is the intensity at a point on the screen that corresponds to θ = 1.20o?

A thin film of glycerin (n = 1.473) of thickness 486 nm with air on both sides is illuminated with white light at near normal incidence. What wavelengths will be strongly reflected in the range 300 nm to 700 nm?  nm (smallest value)  nm  nm (largest value)