{"version":"1.0","type":"link","title":"Focal length - Newikis","description":"The focal length tells how strongly a lens, a curved mirror or another optical device brings light together or spreads it out. If rays of light go straight into a lens and the focal length is positive, the focal length is the distance to the point behind the lens where the rays will be brought to a…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400}