"Det är en av fysikens lagar."

Translation: It is one of the laws of physics.

[Brave.ami]

That is one of the physic's laws.
why it is not accepted

[devalanteriel]

English doesn't use the definite for "physics" that way.

[Metlieb]

I don't quite understand why it's fysikens lagar and not fysiks lagar. It just sounds awkward to use the genitive with the definite from: One of the physics laws.

[Arnauti]

In some cases we like to use the definite form for abstract nouns where English prefers to have them indefinite. I answered a similar question yesterday here: https://www.duolingo.com/comment/8679677
We think that fysiken is something specific, I know what physics we're talking about, you know what physics we're talking about, it's not 'just any physics', so it should be definite.

[Metlieb]

Makes sense in some way. Thank you :)

[Jahe12]

Why not "den"?

Edit: I think I have understood. In this kind of cases it is always det in the beginning.

[devalanteriel]

Correct. Have a belated lingot. :)

[fergusincoronato]

Suggestions for "lagar" are misleading.

[Zmrzlina]

When mousing over a word, all possible translations will be shown.

[PLLumsdaine]

Would “It’s a law of physics” be reasonable, or is there a different Swedish phrasing that would parallel that?

[devalanteriel]

Better as det är en fysiklag, though I'd be inclined to accept both here.

[SebastianA68264]

"It is a law of physics" should be accepted here since the English indefinite "a law" in fact means "one of the laws".

[devalanteriel]

Seems reasonable in this case. I'll add it.