*** Please answer only d. Although beats are often associated with sound waves, light waves can also exhibit beats, in which case it is brightness instead of loudness that changes with time. To test this, you perform the double slit experiment with a laser that emits two different wavelengths of light, 450 nm (blue) and 650 nm (red). Both wavelengths are sent through both slits. The slits are separated by 7.5 × 10−5 m and the interference pattern is observed on a screen located 1.5 m away from the slits. All light rays have the same phase constant. a) What wavelength of light do you see at the center of the screen and what is the time interval between moments of maximum brightness? b) Consider the first location above the center at which the red light constructively interferes. Between the center and this location, how many times will the blue light destructively interfere? How about constructively interfere? c) Determine the smallest distance from the center of the screen to the location where both the red light is constructively interfering AND the blue light is constructively interfering. d) Is there a location on the detector screen at which the red light is constructively interfering and the blue light is destructively interfering? If so, what is the smallest distance above the center of the detector for such a location?
Refraction of Light
Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.
Angle of Refraction
Light is considered by many scientists to have dual nature, both particle nature and wave nature. First, Particle nature is one in which we consider a stream of packets of energy called photons. Second, Wave nature is considering light as electromagnetic radiation whereas part of it is perceived by humans. Visible spectrum defined by humans lies in a range of 400 to 700 nm wavelengths.
Index of Refraction of Diamond
Diamond, the world’s hardest naturally occurring material and mineral known, is a solid form of the element carbon. The atoms are arranged in a crystal structure called diamond cubic. They exist in a huge variety of colours. Also, they are one of the best conductors of heat and have a very high melting point.
*** Please answer only d.
Although beats are often associated with sound waves, light waves can also exhibit beats, in which case it is brightness instead of loudness that changes with time. To test this, you perform the double slit experiment with a laser that emits two different wavelengths of light, 450 nm (blue) and 650 nm (red). Both wavelengths are sent through both slits. The slits are separated by 7.5 × 10−5 m and the interference pattern is observed on a screen located 1.5 m away from the slits. All light rays have the same phase constant.
a) What
b) Consider the first location above the center at which the red light constructively interferes. Between the center and this location, how many times will the blue light destructively interfere? How about constructively interfere?
c) Determine the smallest distance from the center of the screen to the location where both the red light is constructively interfering AND the blue light is constructively interfering.
d) Is there a location on the detector screen at which the red light is constructively interfering and the blue light is destructively interfering? If so, what is the smallest distance above the center of the detector for such a location?
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