Light from a 560-nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 30. What is the angle of reflection from the surface?
a. 30
c. 60
b. 75
d. 15
Question 2
An inventor develops a stationary cycling device by which an individual, while pedaling, can convert all of the energy expended into heat for warming water. What minimum power must be generated if 300 g of water (enough for 1 cup of coffee) is to be heated in 10 min from 30C to 90C? (1 cal = 4.186 J, the specific heat of water is 4 186 J/kg C)
a. 9400 W
c. 160 W
b. 590 W
d. 130 W
About to break the surface for air at Kona, Hawaii
An overview of photosynthesis: cooperation of the light reactions and the Calvin cycle.
Part of the Hubble Ultra-Deep Field image showing a typical section of space containing galaxies int
Observed change in surface temperature from 1901 to 2012
Reflection of light rays
The xy plane is painted with a uniform surface charge density which is equal to 40 nC/m2 . ...