Terms of Use

Please use it — in class and beyond

You have our blessing (a free, non-exclusive, revocable licence) to use fysiklab.dk for personal, classroom, and non-commercial educational purposes. Yes, that includes:

• Showing the simulations on screen while you teach or present
• Screenshotting or screen-recording them for student reports, worksheets, slides, and teacher materials
• Sharing links with your students and colleagues — please do
• Using them for homework, projects, and your own curiosity

A small thank-you: credit us

When a screenshot or figure leaves your classroom — in a report, a slide deck, a website, or print — a simple "fysiklab.dk" credit (with a link where you can) is all we ask. Inside your own classroom, don't give it a thought.

A few things to check with us first

We want fysiklab.dk to stay free for students and teachers, and that only works if we keep the commercial side to ourselves. So please just ask us before you:

• Sell or redistribute the simulations, or build them into a paid product or service
• Re-host or republish a copy of the platform
• Bulk-download or scrape the content
• Use the content to train machine-learning models
• Remove our credit or branding, or present the work as your own

Commercial use? Let's talk

If you'd like to use fysiklab.dk commercially — a paid course, a product, a textbook, a company setting — we'd genuinely love to hear from you. Drop us a line and we'll find a licence that works.

Playing nice

Please use the site lawfully, and be kind to the AI assistant — it's there to help students learn, so don't use it to post harmful or unlawful content, or to try to break the service.

Content and links from others

Some 3D models and textures come from third parties under their own licences (for example Creative Commons Attribution) and are credited inside the relevant simulation — those stay under their own terms, and the permissions above cover only our own original work. We may also link to other websites we don't control; if you follow those links, you're in their hands, not ours.

The honest small print

The simulations are teaching tools: physics is simplified and idealised to make it clear, so small inaccuracies are possible. Everything is provided "as is", for education and illustration — please don't rely on it for professional, safety-critical, or measurement purposes. We can't guarantee it's always available or error-free, and to the extent the law allows, we can't take responsibility for how it's used or for any loss arising from using it.

Your privacy

We collect very little, and what we do collect is explained in our Privacy Policy.

Updates to these terms

Fysiklab.dk is growing fast, so simulations may change or move, and we may update these terms now and then. The current version always lives here, and continuing to use the site means you're happy with it.

Governing law

These terms follow Danish law, and any dispute is settled by the Danish courts.

Say hello

Questions about these terms, a commercial licence, or anything else?