BBC2 年
Refraction and lenses
It is refraction that makes some objects ... rays appear to meet at a single point. Focusing light is important for getting clear images in our eye or in photographs, because images that are ...
Only those with high IQ can answer which way the arrow is pointing in 10 seconds
In the image, there is a paper behind the glass that shows two arrows. The readers are challenged to find the direction in ...
Daily Post Nigeria on MSN4 个月
Uncorrected eye refraction error, a major challenge for children – Optometrist Association
The Nigeria Optometrist Association, NOA, have identified uncorrected refraction error as one of the most common eye ...