In a Young's interference experiment, the distance between two slits is 0.5 mm and a perpendicular distance between slits and observation screen is 1 m. - 1) When the plane incident light beam has a wavelength of A 600 nm, what are the locations of the 1st and the 3rd order of interference pattern maxima as well as the distance between two maxima on the observation screen? 2) When using the second incident light to repeat above Young's experiment, one observes that location of the 4th order of interference pattern maxima is the same as the location of the 3rd order of the maximum interference pattern when using the previous light (λ = 600 nm). What is the wavelength of the second light beam? -

When a light beam travels from air (n incorrect? 1.0) to water (n 1.33), which of following statement is A. Light velocity in water is reduced. B. Light wavelength in water is reduced. C. Light frequency in water is reduced. D. Light color in water is not changed.

4. When a plane wave of monochromatic visible light falls normally on a plate with a circular hole (radius of the hole is r = 0.5mm), a dark spot appears at the center of the optical axis, which has a distance of 20cm away from the diffraction hole. Calculate the wavelength of this visible light.

Estimate the grating period of a second-order DBR for a guided wave at 1.55 µm in a symmetric slab semiconductor waveguide where n = = 3.5 and n2 = 3.45.