Problem 25.63 A 0.45 mW laser produces a beam of light with a diameter of 1.4 mm. Part A What is the average intensity of this beam? Express your answer using two significant figures. lav = Submit |Π| ΑΣΦ Incorrect; Try Again T = My Answers Give Up Submit Part B At what distance does a 160 W lightbulb have the same average intensity as that found for the laser beam in part (a)? (Assume that 5.0% of the bulb's power is converted to light.) Express your answer using two significant figures. IVE ΑΣΦ My Answers Give Up ? ? kW/m² cm Provide Feedback Continue
Problem 25.63 A 0.45 mW laser produces a beam of light with a diameter of 1.4 mm. Part A What is the average intensity of this beam? Express your answer using two significant figures. lav = Submit |Π| ΑΣΦ Incorrect; Try Again T = My Answers Give Up Submit Part B At what distance does a 160 W lightbulb have the same average intensity as that found for the laser beam in part (a)? (Assume that 5.0% of the bulb's power is converted to light.) Express your answer using two significant figures. IVE ΑΣΦ My Answers Give Up ? ? kW/m² cm Provide Feedback Continue
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Transcribed Image Text:Problem 25.63
A 0.45 mW laser produces
diameter of 1.4 mm.
beam of light with a
Part A
What is the average intensity of this beam?
Express your answer using two significant figures.
Iav =
Submit
ΫΠ ΑΣΦ
Incorrect; Try Again
T =
My Answers Give Up
Submit
Part B
At what distance does a 160 W lightbulb have the same average intensity as that found for the laser
beam in part (a)? (Assume that 5.0% of the bulb's power is converted to light.)
Express your answer using two significant figures.
[Π ΑΣΦ
My Answers Give Up
?
?
kW/m²
cm
Provide Feedback
Continue
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