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

Wave Optics> Define focal length?...

Define focal length?

KAMAL , 10 Years ago

Grade 12

8 Answers

venky

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

the equivalent distance in a compound lens or telescope.

Last Activity: 10 Years ago

HARI OBULESU

the distance between center to the pole is called focal length

Last Activity: 10 Years ago

PRAPULPODISHETTI

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

Approved

Last Activity: 10 Years ago

SHANMUKESHWAR

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.

Last Activity: 10 Years ago

chandu

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

Last Activity: 10 Years ago

siva prasad reddy

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.

Last Activity: 9 Years ago

pavan picheri

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.

Last Activity: 9 Years ago