Definition

Noun: The ability of an optical instrument, such as a microscope or telescope, to distinguish or separate two objects or points that are very close together. It is a measure of the instrument's capacity to produce distinct, separate images of adjacent details.

Usage

This term is used specifically in the fields of optics, microscopy, and astronomy to describe and quantify the clarity and detail an instrument can provide. It is a technical specification. - The resolving power of this telescope allows astronomers to see two stars in a binary system as distinct points of light. - A higher numerical aperture generally increases the resolving power of a microscope.

Advanced Usage

• In Digital Imaging: The concept is analogous in digital photography and imaging, where it refers to the sensor's ability to distinguish fine detail, though the term "resolution" is more common.
• Quantitative Measure: Resolving power is often expressed numerically, such as the smallest angular separation (in arcseconds) or linear distance (in nanometers) that can be distinguished.

Variants and Related Words

• Resolution (n): A more general term for the ability to distinguish fine detail. In optics, it is often used interchangeably with "resolving power," though "resolution" can also refer to the number of pixels in a digital image.
• Resolve (v): To separate or distinguish between closely adjacent objects or details.
  • This lens can resolve features as small as 200 nanometers.

Synonyms

• Discriminatory power
• Resolving capacity
• Definition (in a technical, optical context)

Related Phrases

• Limit of resolution: The minimum distance or angular separation at which two points can be distinguished as separate.
  • The limit of resolution for a light microscope is approximately 200 nm.
• Angular resolution: A specific type of resolving power that measures the smallest angular separation that can be distinguished, commonly used for telescopes.

Noun

1. the ability of a microscope or telescope to measure the angular separation of images that are close together