A Year of Late Cornish Day 339

Trei Hansves Dedh Nownjek warn Ügens

De Yow, wheffes mis Kevardhû.

Thursday, 6^th December

An lagajow a vabden ell gweles nebes liwyow. Res ew dhe gan ampydnyon dhe dhesky an liwyow. Ma dhe gan lagas gwily a gilligow, nebes formys pecar’a gônys. Ma trei ehen a gôn. Cônys rag todnhes berr ell clowes golow blou po purpur. Ma dhe’n golow ma nerth ûhel ha re anodho ell gwil drog dhe’n lagas. Na ellen nei clowes golow ûghviolet, saw nag ew hedna an câss gen gwenyn ha dranow. An re ma ell gweles merkys war flourys dhe ga ledya tûa an nectar. Cônys todnhes hir ell clowes golow rüdh (nerth isel). Na ell gwenyn ha dranow gweles an golow ma. Ma cônys todnhes cres o clowes golow melyn/gwer. Na ell an brâssa radn a vrodnviles gweles golow rüdh, rag hedna nag ew tarow grevys gen clout rüdh!  (Nag ew da ganjo an den.) 

Human eyes can see several colours. Our brains have to learn the colours. Our eye has a layer of cells, some shaped like cones. There are three types of cone. Cones for short wavelength can sense blue or purple light. This light has high energy and too much of it can damage the eye. We cannot sense ultraviolet light, but that is not the case with honeybees and bumble bees. These can see marks on flowers to guide them towards the nectar. Long wavelength cones can sense red light (low energy). Honeybees and bumble bees can’t see this light. Middle wavelength cones detect yellow-green light. Most mammals can’t see red light, so a bull is not annoyed by a red rag! (It doesn't like the man.)