Image Formation by Thin Lenses: Physics Concepts
Explore the formation of images by refraction in thin lenses with spherical or planar surfaces. Learn about converging and diverging lenses, focal points, and image characteristics through insightful examples in this physics lecture series.
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Presentation Transcript
Images formed by refraction Thin lenses (approximation) medium with spherical or planar surfaces optic axis - line that passes through the centers of curvature of the two surfaces spojky rozptylky diverging lenses converting lenses two focal points: F position where an object produces an image at infinity F position where parallel rays incident on the lens are focused focal length f, f - distance between F or F , respectively, and the center of a thin lens f = f > 0 for converting lens f = f < 0 for diverging lens 1 ?+1 ? =1 The same equation is valid: ? Physics I-2022, Lecture 13-2 1
Image formation by a thin converting lens i) construction using two principal rays Image: real, inverted Try another problem: f = 5 cm, x = 3 cm (virtual, larger, erect) Physics I-2022, Lecture 13-2 2
Image formation by a thin diverting lens y = 1 cm, f = - 4 cm, x = 12 cm, i) construction using two principal rays Image: virtual, erect, smaller Physics I-2022, Lecture 13-2 3
End of video 13-2 Physics I-2022, Lecture 13-2 4
