the red and white is from the danish flag and the blue is from the swedish flag. this is because we have been in union with both of these countries. the cross also symbolise the Christianity witch is a big part of the norwegian culture.
More information about the flag:
http://en.wikipedia.org/wiki/Flag_of_Norway
i hope this may help you ;)
Because of Christianity.
The cross symbolizes Christianity.
Norway
it's obviously Iceland.
This is the Norwegian Flag: red in all corner (two rectangles, two squares) blue stripe (cross), white bordering
It is a long standing flag-tradition that christian countries have a cross in their flag. Our state religion is christian (though we are not a very religious nation, its our cultural heritage more like it) All the Scandinavian countries have the same cross in their flag. The colours: red, white and blue symbolizes freedom. The US and Norway both have these colours, and we are both free after having been under the rule of some other nation, Norway under Sweden and denmark, and the US under the british empire:)
The flag of Norway has a red background with a blue 'Scandinavian cross' on it. The Scandinavian cross is outlined by white stripes. The vertical stripe of the cross isn't centered; instead it's based on the left side of the flag.Norwegian Flag Meaning:The colors of the Norwegian flag are believed to have been influenced by the flags of France, the United States and Britain and are considered the colors of liberty and independence. The cross is common to most Scandinavian flags, and represents Norway's link to the other Scandinavian countries.Red,White,And Blue
Denmark and Switzerland; they are of two different designs The Danish cross is the same as used in the flags of Finland, Iceland, Norway and Sweden all in different colours. It is basically a Latin Cross laying on its side. The Swiss flag I believe is square with equal sided white (Greek) cross in the middle. The reverse of the Swiss flag is used by the Red Cross.
This is the flag of Scotland. ------------------------------------------------------------------------------------------------------------------A flag with a white Nordic cross is Shetland. A flag with a white diagonal cross is the St. Andrew cross of Scotland.
The Nordic cross is a model after the danish flag (the oldest national flag still in use in the world) legends say that the flag fell from the sky in the war of Estland long time ago. Finland, Sweden, Norway, Åland, Faroe Islands, Iceland and other Nordic countries and islands used that model.
The closest to an answer would be the flag used during the Kalmar Union from 1397 to 1523, which unified present day Denmark, Norway, Sweden and Iceland, along with parts of Finland and Northern Germany. In the style of the Nordic cross flags still used in all Nordic countries, the Kalmar flag was a red cross on a yellow background. However, this design has no usage in contemporary Scandinavia.
Switzerland's flag has a cross across it.