| refractory |
Heat-resistant ceramic material.
출처: www.swscc.com/making/making_terms.htm
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| refractor |
This is what you usually think of as a telescope--it has a lens at one end, and you look straight through the other. This is sometimes referred to as a "Galilean" telescope, as it is of the same design that Galileo used (although strictly speaking, a Galilean telescope is a specific kind of refractor--one with a simple double-convex objective lens and a simple double-concave eye lens.
출처: www.astronexus.com/saafaq/glossary.php
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| refractory |
Any material that will not bend, warp, deform or explode at a specific high temperature.
출처: www.evenheat-kiln.com/technical/glassgloss/glassgl...
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| refractor |
A telescope that uses a lens to bring light to a focus at the end of a long tube.
출처: www.eaas.co.uk/news/astronomical_terms.html
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