5. Figure 3 shows the Earth and sun at four specific times of the year. Which po

Question

5. Figure 3 shows the Earth and sun at four specific times of the year. Which position (A-D) represents The Autumnal Equinox The Winter Solstice The longest length of day in the Southern Hemisphere The Vernal Equinox The Summer Solstice Figure 3 Sun B. 6. What is the most northerly point of illumination at position C? 7. What is the most southerly point of illumination at position B? 8. Latitude 76 S would receive 9. At position A, how many degrees north of the equator are the sun's rays striking the Earth perpendicular h urs of daylight at position A. degrees, what name is this line of latitude given? For this part, you are to calculate the height of the sun (sun angle) at the given latitude and for that specific time of year. Pretend it is the equinox. 90°- Lat. is your Sun Angle (SA). If you are not on the equinox, adju your answer appropriately for the season. For example, our latitude. 90°-42°: 48, equinox sun angle-Or Winter Solstice, the sun will be 23% o lower, so, 480-23 ½ a-24 ½SA. 10. What is the noon sun angle at 50 N on the winter solstice? 11. What is the noon sun angle at 50° N on the autumnal equinox? 12. Which location, Sao Paolo, Brazil (24°), or Los Angeles, CA (34°), would receive more solar radiation on September 21 (assuming no clouds at either location)

Explanation / Answer

5) The Autumal Equinox B .

The Vernal Equinox D .

The Winter Solstice C .

The Summer Solstice A .

The longest length day in Southern Hemisphere C .

6) What is the most northerly point of illumination at position C ?

Ans. Arctic Circle (66.5oN).

7) What is the most southerly point of illumination at position B ?

Ans. South Pole. As point B is the Autumal Equinox, So, it is the day when any point on the Earth experience equal day and equal night.

8) Latitide 76oS would receive 0   hours of daylight at position A.

Because in this condition the Sun will below the horizon all the day.

9) At position A , how many degrees north of the equator are the sun's rays striking the earth perpedicular 23.5   degrees. What name is this line of the latitude given? Tropic of Cancer  .

11) What is the noon sun angle at 50oN on the winter solstice ?

Ans. At winter solstice sun is directly overheaded at 23.5oS latitude.

So, the noon sun angle is = [90 - (50 + 23.5)] = 90 - 73.5 = 16.5 degree.

12) What is the noon sun angle at 50oN on the autumnal equinox ?

Ans. At autumnal equinox sun is directly overheaded at the equator.

So, the noon sun angle is = [90 - (50 + 0)] = 90 - 50 = 40 degree.

13) September 21 is the the day when there is equal day and equal night all over the Earth. Sun is directly overheaded at the equator. The noon sun angle at 24o is greater than 34o. So, Sao Paolo, Brazil (24o ) will receive more solar radiation.

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