Ramsden circle
Optics
noun
The exit pupil of a telescope or microscope; the circle of least diameter of the bundle of rays leaving the eyepiece.
Origin
Late 19th century.
- mountain buffalo
- mountain building
- mountain burnet
- mountain butter
- mountain cabbage
- mountain cat
- mountain-cedar
- mountain chain
- mountain cherry
- mountain chestnut oak
- mountain chicken
- mountain climbing
- mountain clover
- mountain cock
- mountain cow
- mountain crab
- mountain cranberry
- mountain crystal
- mountain cure
- mountain currant
- mountain daisy
- mountain devil
- mountain dew
- mountain dock
- mountain duck