Title: Unit 2 Quiz
Course: ELTR 2334 Solar Photovoltaic Technology > Section: ELTR 2334 Solar Photovoltaic Technology

Q: What is the name of the law that describes, mathematically, how radiant power density decreases at the distance from the radiant source increases?

Q: 1,370 W/m^2 is the average solar irradiance received at the top of the earth’s atmosphere.  This value has a formal name.  What is it?

Q: Using words, not irradiance numbers, define the concept of “peak sun.”

Q: What is the commonly accepted irradiance value of “peak sun?”  Give both the quantity and the correct units.

Q: The correct word that means solar “Power” is _________________________, while the word that means solar “Energy” is ______________________________.

Q: What is the approximate numeric value (to one decimal place) of the earth’s angle of declination – the angular difference between the equatorial plane and the plane of the ecliptic?  Give both the quantity and the correct units.

Q: If it is exactly noon on the Autumnal Equinox, in the Northern Hemisphere, and if the sun’s elevation is 35^o where you are standing, what latitude are you standing at?

Q: Based on your previous answer, at this same location on the date of the Winter Solstice, the sun’s elevation will be ______________, while on the data of the Summer Solstice the sun’s elevation will be ______________.

Q: Examine the attached Cartesian Sun Map for 40^o N. Latitude.  On May 21^st, at 9:00 a.m., describe the sun’s position in the sky with values for Azimuth and Altitude/Elevation.

Q: Examine the attached Cartesian Sun Map for 40^o N. Latitude.  Give the approximate date and time when the sun will be positioned at 60^o West Azimuth and 30^o Altitude/Elevation.