Podcast
Questions and Answers
What is the term for the sun's apparent location in the sky east or west of true south?
What is the term for the sun's apparent location in the sky east or west of true south?
- Declination angle
- Altitude angle
- Azimuth angle (correct)
- Zenith angle
Which angle defines the off-south position in the horizon?
Which angle defines the off-south position in the horizon?
- Solar declination
- Azimuth angle (correct)
- Zenith angle
- Altitude angle
What determines the height of the sun above the horizon?
What determines the height of the sun above the horizon?
- Azimuth angle
- Altitude angle (correct)
- Solar declination
- Zenith angle
When does the shortest solar day typically occur for places in the northern hemisphere?
When does the shortest solar day typically occur for places in the northern hemisphere?
During which phenomenon should the length of the day be theoretically equal to the length of the night?
During which phenomenon should the length of the day be theoretically equal to the length of the night?
What is the angle formed between the plane of the equator and a line drawn from the center of the sun to the center of the Earth called?
What is the angle formed between the plane of the equator and a line drawn from the center of the sun to the center of the Earth called?
During which celestial event is the declination angle equal to 0?
During which celestial event is the declination angle equal to 0?
What is the angle between the sun and the local horizon directly beneath the sun known as?
What is the angle between the sun and the local horizon directly beneath the sun known as?
In terms of its reference, when is the azimuth angle positive?
In terms of its reference, when is the azimuth angle positive?
What causes the seasonal variation of the solar declination angle?
What causes the seasonal variation of the solar declination angle?
What is the declination angle denoted by?
What is the declination angle denoted by?
At what point is the Earth nearest the sun during its orbit?
At what point is the Earth nearest the sun during its orbit?
What is the tilt equal to for the highest average insolation on a PV module?
What is the tilt equal to for the highest average insolation on a PV module?
Which of the following days marks the summer solstice?
Which of the following days marks the summer solstice?
What would be the variation in distance on July 4 from the aphelion point?
What would be the variation in distance on July 4 from the aphelion point?
What is the typical unit for peak sun hours?
What is the typical unit for peak sun hours?
Which type of radiation reaches the earth surface directly from the sun?
Which type of radiation reaches the earth surface directly from the sun?
What represents the sum of direct and diffuse radiation in solar radiation components?
What represents the sum of direct and diffuse radiation in solar radiation components?
If the Air Mass is 1.5, what are the values of h1 and h2?
If the Air Mass is 1.5, what are the values of h1 and h2?
What is the term used to describe the sun's height above the horizon?
What is the term used to describe the sun's height above the horizon?
What is the relationship between solar declination, latitude, and zenith angle?
What is the relationship between solar declination, latitude, and zenith angle?
How does the altitude angle of the sun change throughout the day at a specific location?
How does the altitude angle of the sun change throughout the day at a specific location?
How does the seasonal variation of solar declination affect solar radiation at different latitudes?
How does the seasonal variation of solar declination affect solar radiation at different latitudes?
How does the azimuth angle relate to the orientation of a solar panel?
How does the azimuth angle relate to the orientation of a solar panel?
How does the altitude angle of the sun at solar noon compare at different latitudes?
How does the altitude angle of the sun at solar noon compare at different latitudes?
What is the astronomical unit (AU) used for in the solar system?
What is the astronomical unit (AU) used for in the solar system?
What is the estimated travel time for photons released in fusion reactions at the sun's core to reach the surface?
What is the estimated travel time for photons released in fusion reactions at the sun's core to reach the surface?
What is the speed at which solar radiation travels?
What is the speed at which solar radiation travels?
How much energy from the sun hits the Earth every hour?
How much energy from the sun hits the Earth every hour?
What does solar insolation refer to?
What does solar insolation refer to?
What is the term for the angle between the sun and the local horizon?
What is the term for the angle between the sun and the local horizon?
Which angle defines the sun's position north or south of the equator?
Which angle defines the sun's position north or south of the equator?
What causes the seasonal variation of solar declination?
What causes the seasonal variation of solar declination?
In which phenomenon does the sun have its highest altitude and lowest daily path length for an observer at 0° latitude?
In which phenomenon does the sun have its highest altitude and lowest daily path length for an observer at 0° latitude?
What is the name for the angle that defines the sun's compass direction in the sky?
What is the name for the angle that defines the sun's compass direction in the sky?
At what angle are the rays of the sun most intense for an observer at equator during the equinoxes?
At what angle are the rays of the sun most intense for an observer at equator during the equinoxes?
