This refraction is due to the velocity of light through air decreasing (the refractive index increases) with increased density. Atmospheric refraction near the ground produces mirages.

Answer. Atmospheric refraction affects the sunrise as it give us 2 minutes variation as well as 2 minutes late in sunset.

We can see the sun 2 minutes before the actual sunrise and 2 minutes after the actual sunset due to atmospheric refraction. So, the total time lengthened is 2 + 2 = 4 minutes.

The Sun is visible to us about 2 minutes before the actual sunrise, and about 2 minutes after the actual sunset because of atmospheric refraction. The time difference between actual sunrise and the apparent sunrise is about 2 minutes. The day is longer on Earth by about 4 minutes due to atmospheric refraction.

Due to continuous refraction of light rays at each layer, it follows a curved path and reaches the eye of the observer. As a result , we can see the sun 2 mins.

Antarctica has six months of daylight in its summer and six months of darkness in its winter. The seasons are caused by the tilt of Earth’s axis in relation to the sun. The direction of the tilt never changes. But as the Earth orbits the sun, different parts of the planet are exposed to direct sunlight.

All of Alaska does not go dark in winter! But the further north you go, the darker it gets.

Kotzebue Kotzebue

Barrow—Alaska’s northernmost village—lies far above the Arctic Circle. This is why it’s constantly exposed to the sun during some parts of the year, preventing it from experiencing night for more than two months.

The occurrence takes place each winter because of the tilt of the Earth’s axis. “This tilt makes it so that none of the Sun’s disc are visible above the horizon,” according to Chinchar. But that doesn’t mean the town will be completely dark.

Alaska does not limit or tax alcoholic beverages brought into this state for personal use and not for resale. Over 75 Alaska communities have, by local option, banned the importation or possession of alcoholic beverages. It may be a felony crime to ship alcoholic beverages to those communities.

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Given its geographic place on the planet, winter in Alaska is not just cold, it is dark. Daylight in the northernmost regions is nonexistent for months at a time creating a physiological shift in mood and disposition. Sufferers of SAD often experience anxiety, malaise, and deep depression.

Check out these 9 dangerous disadvantages of living in Alaska.

• Moose Attack. Al_HikesAZ | Flickr.
• Bear Charge. Marshmallow | Flickr.
• Bad Drivers! Craig Cloutier | Flickr.
• Walking on Ice. Karen Eliot | Flickr.
• Freezing to Death. Steve Evans | Flickr.
• Tsunami Zone.
• Road Construction.
• Bad Cell Service.

One of the worst things about living in Alaska is the lack of tasty, fresh fruit and vegetables, especially throughout the winter. 5. Sun guilt. Not soaking up every last second of that glorious midnight sun makes always reminds us that we will be kicking ourselves in the wintertime.

Alaska is a dangerous place to live. With the highest rates of rape, drowning and suicide in the U.S., it’s no surprise a Harvard study ranks the state as the third most dangerous when it comes to violent and property crimes. Only Nevada and Tennessee were found to have higher per capita violent crime rates.

20 Things Everyone In Alaska Should Avoid At All Costs

• Farmed seafood. Flickr – Judi Knight.
• Or buying fish in general.
• Even feeding your dogs farmed fish.
• Eating hot dogs.
• Camping without a view.
• Snacking on chips from the lower 48.
• Shopping at big corporate box stores.
• Drinking wine that isn’t from Alaska.

Alaska has some of the best hunting and fishing anywhere in the world. If hunting and fishing are two of your favorite pastimes, you’ve come to the right place. Alaska offers some of the most unique hunting and fishing opportunities in the world. There’s plenty of fishing experiences to be had in Alaska as well.

The land isn’t entirely free, either: It will cost a reasonable $2.50 an acre to those who successfully fulfill the settlement requirements and pay the filing fees necessary to obtain legal ownership of the tract. MOTHER EARTH NEWS asked a BLM representative what kind of environment a would-be pioneer might face.