3. I have a convex lens of focal length 40 cm and diameter 10 cm. It's a clear day and I use it to focus an image of the sun onto a piece of paper. a. What is the diameter of the image? (The angular size of the sun as seen from the earth is 32' = 0.53 deg) b. By what factor is the sun’s energy in the image increased compared to the incident sunlight? The ambient temperature is 90F. Assuming the temperature of the paper in the sun’s image is that same factor higher as in part b, will the paper catch fire? (Recall, paper burns at "Fahrenheit 451")
3. I have a convex lens of focal length 40 cm and diameter 10 cm. It's a clear day and I use it to focus an image of the sun onto a piece of paper. a. What is the diameter of the image? (The angular size of the sun as seen from the earth is 32' = 0.53 deg) b. By what factor is the sun’s energy in the image increased compared to the incident sunlight? The ambient temperature is 90F. Assuming the temperature of the paper in the sun’s image is that same factor higher as in part b, will the paper catch fire? (Recall, paper burns at "Fahrenheit 451")
Related questions
Question
Transcribed Image Text:3. I have a convex lens of focal length 40 cm and diameter 10 cm. It's a clear day and I use it to
focus an image of the sun onto a piece of paper.
What is the diameter of the image? (The angular size of the sun as seen from the earth is 32' =
0.53 deg)
b. By what factor is the sun's energy in the image increased compared to the incident sunlight?
c. The ambient temperature is 90F. Assuming the temperature of the paper in the sun's image is that
same factor higher as in part b, will the paper catch fire? (Recall, paper burns at "Fahrenheit
451")
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 5 steps
