Solar Angles and Radiation Quiz

What is the solar azimuth angle?

• Angle measured clockwise from true north to the sun's position

• Angle measured counterclockwise from true north to the sun's position

• Angle measured from the sun's position to the vertical

• None of the above

At solar noon, the solar azimuth angle is:

• 0°

• 90°

• 180°

• 270°

The solar zenith angle is the angle between:

• The sun's rays and the vertical

• The sun's rays and the horizontal

• The sun's rays and the Earth's surface

• The sun's rays and the moon's position

The duration of daylight varies with:

• Latitude

• Longitude

• Altitude

• Time of year

On the equinox, the length of the day is:

• 12 hours

• 24 hours

• 6 hours

• 18 hours

At the poles, the duration of daylight during the summer solstice is:

• 24 hours

• 12 hours

• 6 hours

• 18 hours

Local Apparent Time (LAT) is based on:

• The position of the sun

• The position of the moon

• The time zones

• The Earth's rotation

The equation of time is used to correct for:

• The difference between solar time and standard time

• The difference between local time and standard time

• The difference between solar noon and local noon

• The difference between day and night

Solar time differs from local time due to:

• Longitude

• Latitude

• Altitude

• Time of year

The air mass ratio (AM) is defined as:

• The path length of sunlight through the atmosphere compared to the vertical path length

• The amount of air above a given point

• The density of the atmosphere

• The temperature of the atmosphere