![optics - Does 'focal length' mean something different with lenses and pinhole cameras? - Physics Stack Exchange optics - Does 'focal length' mean something different with lenses and pinhole cameras? - Physics Stack Exchange](https://i.imgur.com/Rmy2GPU.png)
optics - Does 'focal length' mean something different with lenses and pinhole cameras? - Physics Stack Exchange
![What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and convex mirror What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and convex mirror](https://api.flasheducation.co.in/media/images/2021/11/10/image_AWRahUn.png)
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and convex mirror
![a) What is meant by i) principal focus of a convex mirror ii) focal length of a convex mirror?b) Draw diagram to show the action of convex mirror on a beam of a) What is meant by i) principal focus of a convex mirror ii) focal length of a convex mirror?b) Draw diagram to show the action of convex mirror on a beam of](https://www.learnatnoon.com/s/in//wp-content/uploads/sites/8/2021/09/erf27.jpg)
a) What is meant by i) principal focus of a convex mirror ii) focal length of a convex mirror?b) Draw diagram to show the action of convex mirror on a beam of
![How do aperture and focal length affect the DOF or exposure on different sized sensors? | Tyson Robichaud Photo-blography How do aperture and focal length affect the DOF or exposure on different sized sensors? | Tyson Robichaud Photo-blography](https://tysonrobichaudphotography.files.wordpress.com/2012/07/dof1.jpg)
How do aperture and focal length affect the DOF or exposure on different sized sensors? | Tyson Robichaud Photo-blography
![zoom - Is it exactly true that doubling the focal length makes everything look twice as big? - Photography Stack Exchange zoom - Is it exactly true that doubling the focal length makes everything look twice as big? - Photography Stack Exchange](https://i.stack.imgur.com/r56XA.png)
zoom - Is it exactly true that doubling the focal length makes everything look twice as big? - Photography Stack Exchange
![Focal length, explained by RP; focal distance, dioptric power, curved mirror, lens equation, microscope, photographic objective, focus, beam radius Focal length, explained by RP; focal distance, dioptric power, curved mirror, lens equation, microscope, photographic objective, focus, beam radius](https://www.rp-photonics.com/img/focal_length.png)
Focal length, explained by RP; focal distance, dioptric power, curved mirror, lens equation, microscope, photographic objective, focus, beam radius
![Define the terms focus and focal length of a concave mirror . Draw diagram to illustrate your answer. Define the terms focus and focal length of a concave mirror . Draw diagram to illustrate your answer.](https://haygot.s3.amazonaws.com/questions/1711212_1807990_ans_73e1b932fadb4121b8eeb1983c96e349.png)