the distance between the centre of a lens or curved mirror and its focus. the equivalent distance in a compound lens or telescope.

Grade 12Wave Optics

Define focal length?

KAMAL

10 Years agoGrade 12

8 Answers

venky

10 Years ago

the distance between the centre of a lens or curved mirror and its focus.

the equivalent distance in a compound lens or telescope.

HARI OBULESU

10 Years ago

the distance between center to the pole is called focal length

PRAPULPODISHETTI

Approved Tutor Answer10 Years ago

A mirror which is a part of a sphere is called Sherical Mirror.

SHANMUKESHWAR

10 Years ago

Focal length (shown in red) is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where parallel rays of light meet, or converge.

chandu

10 Years ago

The focal length of an optical system is a measure of how strongly the system converges or diverges light.

siva prasad reddy

10 Years ago

A mirror which is a part of a sphere is called Sherical Mirror.or Focal length (shown in red) is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where parallel rays of light meet, or converge.

pavan picheri

10 Years ago

The focal length of the lens is the distance between the lens and the image sensor when the subject is in focus, usually stated in millimeters (e.g., 28 mm, 50 mm, or 100 mm). In the case of zoom lenses, both the minimum and maximum focal lengths are stated, for example 18–55 mm.