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Lynx1390
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1. A 2.5m aperture telescope obverses a star through an R filter. Assume that there is no noise associated with the detection system. The CCD has a full well depth of 20,000 counts and a gain correction factor of 1.00000.
a. On average, the telescope detects 3 photons/sec from this star. What is the probability that it will detect less than three photons in an 1 second observation
I'm pretty sure I got this one, use the Poisson distribution as shown below.
P = (3^0e^(-3))/0! + (3^1e^(-3))/1! + (3^2e^(-3))/2! = 0.42
b. Another star is observed. On average, the telescope detects 1,230 photons/sec from this star. What is the probability that will detect more than 1,230 photons in anyone second observation?
It is this part I am a little unsure of, I know I need to use the normal distribution but not sure how to reach from it.
Thanks in advance
a. On average, the telescope detects 3 photons/sec from this star. What is the probability that it will detect less than three photons in an 1 second observation
I'm pretty sure I got this one, use the Poisson distribution as shown below.
P = (3^0e^(-3))/0! + (3^1e^(-3))/1! + (3^2e^(-3))/2! = 0.42
b. Another star is observed. On average, the telescope detects 1,230 photons/sec from this star. What is the probability that will detect more than 1,230 photons in anyone second observation?
It is this part I am a little unsure of, I know I need to use the normal distribution but not sure how to reach from it.
Thanks in advance