Two laser pointers were attached to the blackboard, and an elderly person demonstrated the effects of concave and convex lenses on light using both reading glasses and bifocals. This footage was ...

Resolving Chromatic Aberration Since no one lens can focus different light wavelengths at a single point, there’s a need to use multiple convex and concave lenses made from different types of ...

Lens is a piece of transparent glass bound by two spherical surfaces, used to magnify objects. It is an important instrument used in camera, microscopes etc.

Discover how wave refraction works, why it happens and how it affects surfing in this easy-to-understand guide.

A mirror image is the result of light rays bounding off a reflective surface. Reflection and refraction are the two main aspects of geometric optics.

A microlens that uses negative refraction to achieve a record focal length of 12 µm could benefit high-density imaging and optoelectronics systems. US researchers have engineered a concave photonic ...

All the latest science news on concave lenses from Phys.org. Find the latest news, advancements, and breakthroughs.

Contact lenses increase or decrease the focusing potential of the cornea, and thereby directly project light onto the retina and aid in treating refractive errors.

The refractive lens, operated with a variable concave profile, is joined to the diffractive component and the system focal length is tuned using hydraulic actuation.

A concave eyepiece then magnified the tiny image for the viewer to see. Galileo's first telescope offered limited magnification and a narrow field of view.