BRAINCAKEImage Calculations
The position of the image formed by a thin lens can be calculated with the lens equation:
1/u + 1/v = 1/f
u is the distance from the lens to the object, v is the distance from the lens to the image, and f is the focal length. All three must be in the same units.
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Key terms in this lesson
- focal length
- The distance from the centre of a lens to the principal focus, where parallel rays converge, or appear to diverge from, after refraction.
More in Optics
- Convex Lenses
- The Power of a Lens
- The Power of Twin Lenses
- Forming an Image
- Magnification
- Plane Polarisation
- Polarising Filters
- Polarisation by Reflection and Refraction
All 21 lessons in Optics · All Edexcel AS-level Physics topics