Questions with the keyword 'light'

• If your car was travelling at the speed of light… what would happen if you turned the headlights on? by drewpeacock to Alan, Murray, Sarah Comments: (No comments so far )
• what are the northern lights by bowser to Alan, Caspar, Diana, Murray, Sarah Comments: (No comments so far )
• how do we measure light years? i know it’s how far away it takes light to travel, but how is it measured and could you by monkey1111 to Alan, Caspar, Diana, Murray, Sarah Comments: (No comments so far )