focal distance - Fixanswer - Get your knowledge fix!

Is Focal Length Constant For A Lens?

January 24, 2024 by Rebecca Patel

Is Focal Length Constant For A Lens? The focal length is a feature of a lens that doesn’t change when one changes the camera. However, with a change of sensor size the viewing angle changes. Also when we focus lenses to a different distance, usually the viewing angle changes! Does the focal length of a

Is Focal Length Inversely Proportional To Refractive Index?

January 24, 2024 by Emily Lee

Is Focal Length Inversely Proportional To Refractive Index? From this formula we can say that focal length of lens is inversely proportional to refractive index of material of lens medium. i.e As Refractive index (m) increases focal length (f) of lens decreases. Is focal length independent of refractive index? A lens works because it has