Keyword Analysis & Research: effective focal length of two lenses formula

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
effective focal length of two lenses formula	0.56	0.7	7714	89	44
effective	0.38	0.8	7299	91	9
focal	1.1	0.1	7999	59	5
length	0.77	1	4058	32	6
of	1	0.5	3024	72	2
two	1.08	0.4	23	82	3
lenses	1.37	0.1	8449	16	6
formula	0.06	0.6	9619	58	7

Keyword	CPC	PCC	Volume	Score
effective focal length of two lenses formula	0.19	1	9520	33