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According to quantum mechan i cs, electromagnetic rad iation of frequency v can be regarded as consisting of photons of energy hu where /i=6.626x 10-34 J.s is the Planck's constant.
(a) What is the frequency range of visible photons (400 nm to 700 nm)? What is the energy range of visible photons (both i n J an d i n eV)?
(b) How many photons per second docs a low power (1 mW) He-Ne laser (4=336 n m) em it? A cell phone that emits 0.4 W of 850 MHz radiation? A microwave oven operati ng at 2 GHz generati ng a microwave power of 1000 W? How many photons of the latter frequency have to be absorbed to heat up a glass of water (0.2 L, heat capacity of water 4.18 kJ.kt 1 .K-1 ) by 20 °C?
At a given power of an electromagneti c wave, do you expect a classical wave description to work better for radio frequ encies, or x-rays? Why? At what He-Ne laser power do you expect quantum effects to become important
A work-study engineer times a certain operation, and discovers that the average time it takes is 10 minutes, but on 15% of occasions it takes more than 13 minutes.
Use RNG in Excel to generate n = 5 observations from the Normal distribution N(20, 5). Test H0: μ = 20 versus H0: μ ≠ 20 at the α = 0.05 level of significance. Repeat this process 100 times and then count the number of times that you reject H0.
What is the best predicted IQ of the wife, given that the husband has an IQ of 105 ? Use a significance level of 0.05.
You took a sample of your expenses for 20 weeks and found that the average is $285 and the standard deviation for the sample is $25. Set up your null and alternative hypothesis for testing whether your cists are different and do the analysis using..
Construct an example of each of the following phenomena: (a) a Markov chain with only absorbing states; (b) a Markov chain that is irreducible but not regular;
Based on the expected return, would you rather invest your money in the stock market or in gold? Why?
It will take 30 minutes regardless of the traffic conditions. Lynn's utility for travel time is: U(15 minutes) = 0.9, U(30 minutes) = 0.7, and U(40 minutes) = 0.2. Which route will minimize Lynn's expected travel time?
A sample of 24 is known to come either from a uniform distribution over the interval (0, 10) or else from a symmetric triangular distribution over the same interval (0, 10). The sample values are
Find the optimal order quantity and what is the optimal total ordering cost per year vs. what is that cost with the current policy?
The monthly sales demand for a new product is uncertain, but it is considered to be adequately described by a normal random variable with mean 50,000 units and variance 100,000,000.
It is very difficult for small businesses to be successful. The Small business administration estimates that 20 percent will dissolve or go bankrupt within two years. A sample of 50 new businesses is selected. (show work) (a) What is the mean and ..
Suppose that patrons of a restaurant were asked whether they preferred beer or whether they preferred wine. 70% said that they preferred beer. 60% of the patrons were male. 80% of the males preferred beer.
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