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grscott_2000
- 49
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Can someone confirm that the focal length of a diverging lens is always negative in value?
Regards
Regards
The focal length of a diverging lens is the distance from the lens to the point where parallel rays of light converge after passing through the lens.
A negative focal length indicates that the lens is a diverging lens. This means that the parallel rays of light passing through the lens will diverge instead of converging, resulting in a virtual image.
The focal length of a diverging lens can be calculated using the lens maker's formula: 1/f = (n-1)(1/R1 - 1/R2), where f is the focal length, n is the refractive index of the lens material, and R1 and R2 are the radii of curvature of the lens surfaces.
No, a diverging lens will always have a negative focal length. This is because the lens is designed to cause the parallel rays of light to diverge, rather than converge.
The focal length of a diverging lens determines the size and position of the resulting image. A longer focal length will result in a smaller and closer image, while a shorter focal length will result in a larger and further image.