Richard Gregory's elucidation of mirror images (Books, THES , October 4) becomes clear when we imagine a fly crawling over a vertical mirror. If it crawls to our left, the fly "in the mirror" crawls left. But if it flies away from the mirror, its image moves further into the mirror.
One dimension - the depth perpendicular to the surface - is reversed by the mirror. The mirror doesn't rotate anything, though that is what we mistakenly feel it is doing.
John Little
Bishopbriggs, Glasgow
Register to continue
Why register?
- Registration is free and only takes a moment
- Once registered, you can read 3 articles a month
- Sign up for our newsletter
Subscribe
Or subscribe for unlimited access to:
- Unlimited access to news, views, insights & reviews
- Digital editions
- Digital access to °Õ±á·¡¡¯²õ university and college rankings analysis
Already registered or a current subscriber? Login