Light travels in straight lines outwards from its source — Science Learning Hub

Light is produced by a source and travels outwards from the source in straight lines and all directions at 300,000 km/s.

Light travels in a straight line / Science experiment/ Science

Light Travels in a Straight Line Experiment (teacher made)

3 Ways to Prove That Light Travels in a Straight Path - wikiHow

Light travels in straight lines, KS2 science

Refraction of light — Science Learning Hub

Observable universe - Wikipedia

Scientific method - Wikipedia

Reflection of light — Science Learning Hub

Sound – wave interference — Science Learning Hub

3 Ways to Prove That Light Travels in a Straight Path - wikiHow

Grade 4 Science Light Travels in a Straight Line

The visible light spectrum