Green laser light with a wavelength of 650 nm travels towards a photodetector.
a.How long does it take the laser to reach the photodetector located 50 meters away?
b.What is the change in the arrival time of the light if a 1 meter block of lucite is placed along the path for the laser to travel through? (index of refraction = 1.50)
c.What is the speed of light through the lucite?
Next, take a second laser (red) with wavelength of 720 nm and also place it 50 meters from the photodetector.
d.You machine a new block of lucite such that when the red light passes through the block, it arrives at the photodetector at the exact same time as the green light traveling through the 1 meter block in part b. Is the lucite block for the red light longer or shorter than the 1 meter lucite block used for the green laser light?
e.What is the speed of the red laser through the lucite?
f.What is the length of the lucite for the red light?
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