PDF for physics from the official Punjab Board website. Access chapter-wise details for physics with the link to download the ...

Technical Terms Compound Refractive Lens (CRL): A lens comprising multiple concave elements designed to focus X‐rays by overcoming absorption losses.

A deep analysis of bi- and plano-concave lens made of stacked subwavelength hole arrays in terms of focus and angular power distribution is presented. The key difference between these left-handed ...

An off-axis flat-concave dual-mirror (FCDM) configuration for an ultrashort focal length projection lens based on the digital light processor (DLP) upright projection-type projector is proposed in ...

Syllabus: The NTA has put the official JEE Main 2026 Syllabus online on their website: jeemain.nta.nic.in. If you're planning ...

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

Dry eye is very common, especially post corneal refractive surgery, and should be treated preoperatively with attention paid ...

Dr. Greg Moloney, MBBS, BSC MED, MMED, FRCSC, Ophthalmologist, talks about vision correction by RLE (Refractive Lens Exchange). Video of Bernie Sanders reacting to Trump's Iran strikes live goes ...

What Is Concave and Convex Refraction? Concave and convex are the different terms of refraction and describe two different ways waves can refract.

In patients who previously underwent refractive surgery or corneal inlay implantation, the small-aperture IC-8 Apthera IOL ...

Meta has launched Superintelligence Labs, headed by Alexandr Wang, to advance AI development. This initiative follows a $14.3 ...