Difference between Concave vs Convex Lens: Isn’t physics one of those subjects that almost every student is scared of? Well why not, given the complexity of ...

The questions in this quiz are suitable for GCSE physics students studying convex and concave lenses, real and virtual images, magnification and colour. If you struggled with the quiz, don't panic - ...

Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from the object through ...

US researchers have focused a plane microwave by a plano-concave lens fabricated from a photonic crystal specially designed to have negative refractive index and left-handed electro-magnetic ...