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beam splitter

American

noun

Optics, Photography.

a mirror or prism that divides a beam of light into two parts by reflecting a part of the beam, used in camera range finders.

beam splitter British

noun

a system that divides a beam of light, electrons, etc, into two or more paths

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of beam splitter

First recorded in 1930–35

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The tide can significantly affect visitors’ experiences, aggravating respiratory problems, leaving beaches littered with rotting sea life and discouraging time spent near the water.

From New York Times • Feb. 13, 2023

Residents here are quick to say that they found the beaches littered with foreign passports — from Morocco, Iran, Algeria, Pakistan — abandoned by migrants looking for a backdoor to Europe.

From Washington Post • Jul. 27, 2016

One common complaint about the dipnet season is that it has the tendency to leave Kenai’s beaches littered with fish remains and other trash.

From Washington Times • Jul. 26, 2015

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023