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PART A: A grating that has 3800 slits per cm produces a second-order bright fringe at a 22.0°
angle. What wavelength of light is being used?
PART B: Select either the farsightedness or nearsightedness defect of the human eye and explain
about it. What are its symptoms, one possible reason for it, what is the physics problem in this
defect (the location of the image), and what type of lens would you prescribe to correct the vision
in this case? (2
PART C: Reading glasses of what power is needed for a person whose near point is 125 cm, so
that he can read a computer screen at 55 cm (assume a lens-eye distance of 1.8 cm)? (7 points).
What is basically the defect with eye? (2 points). What is the type of the needed lens? (2 points).
Is the image produced by this lens real or virtual? (2
Transcribed Image Text:PART A: A grating that has 3800 slits per cm produces a second-order bright fringe at a 22.0° angle. What wavelength of light is being used? PART B: Select either the farsightedness or nearsightedness defect of the human eye and explain about it. What are its symptoms, one possible reason for it, what is the physics problem in this defect (the location of the image), and what type of lens would you prescribe to correct the vision in this case? (2 PART C: Reading glasses of what power is needed for a person whose near point is 125 cm, so that he can read a computer screen at 55 cm (assume a lens-eye distance of 1.8 cm)? (7 points). What is basically the defect with eye? (2 points). What is the type of the needed lens? (2 points). Is the image produced by this lens real or virtual? (2
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