keyword

numerical aperture

Monthly search volume and cost-per-click data for "numerical aperture" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=numerical+aperture&country=us" +--------------+------------------+ | volume | 165,000 | | cpc | $7.94 | | competition | 0.05 | | country | US | | updated | 2026-07-01 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
numerical aperture meaning	6,600	$39.94	16/20
what is numerical aperture	4,400	$0.81	15/20
define numerical aperture	480	$0	16/20
definition of numerical aperture	480	$0	13/20
formula for numerical aperture	390	$0	14/20
numerical aperture in microscope	390	$2.84	13/20
lens numerical aperture	140	$2.26	17/20
numerical aperture of lens	140	$0	17/20
numerical aperture units	70	$0	16/20
numerical aperture equation	70	$0	14/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://api.seodata.dev/v1/keyword?q=numerical+aperture&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt