learn.howToCalculate
learn.whatIsHeading
Thin lens equation relates object distance, image distance, and focal length. It's fundamental to cameras, microscopes, telescopes, and corrective lenses.
공식
The calculator applies 1/f = 1/s_o + 1/s_i
- f
- 1/s_o + 1/s_i — 1/s_o + 1/s_i
단계별 가이드
- 1Enter any two of: object distance (s_o), image distance (s_i), or focal length (f)
- 2The calculator applies 1/f = 1/s_o + 1/s_i
- 3Results show lens behavior and image characteristics
풀어진 예시
입력
s_o = 30 cm, f = 10 cm
결과
s_i = 15 cm, magnification = 0.5×
Real inverted image
피해야 할 일반적인 실수
- ✕Confusing sign conventions for distances and focal lengths
- ✕Using lens equations without considering real vs. virtual images
자주 묻는 질문
When do you get virtual images?
Virtual images form when the object is closer than the focal point (s_o < f); the image appears upright and magnified.
What's the difference between converging and diverging lenses?
Converging (convex) lenses have positive focal length and form real images; diverging (concave) lenses have negative focal length and only form virtual images.
계산할 준비가 되셨나요? 무료 Thin Lens 계산기를 사용해 보세요
직접 시도해 보세요 →