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Author Question: Light of wavelength 500 nm illuminates a round 0.50-mm diameter hole. A screen is placed 6.3 m ... (Read 133 times)

karlynnae

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Light of wavelength 500 nm illuminates a round 0.50-mm diameter hole. A screen is placed 6.3 m behind the slit. What is the diameter of the central bright area on the screen?
 
  A) 15 mm
  B) 270 m
  C) 7.7 mm
  D) 3800 m

Question 2

The objective and the eyepiece of a microscope have focal lengths of 4.00 mm and 25.0 mm, respectively.
 
  The objective produces a real image 30 times the size of the object. The final image is viewed at infinity, and the near point of the microscope user is at 25.0 cm. What is the distance between the object and the focal point of the objective?
  A) 0.13 mm
  B) 0.18 mm
  C) 0.23 mm
  D) 0.28 mm
  E) 0.33 mm


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ghepp

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karlynnae

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Both answers were spot on, thank you once again



ghepp

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