Геометрическая оптика и волны · GCSE Physics Topic 6 (Waves & Optics)
Симулятор оптической скамьи и линз
Симулятор оптической скамьи и построения изображений в собирающих и рассеивающих линзах
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- Вывод формул
- Режим проектора
- Печатный лист A4
Окно 3D симуляции● 60 FPS
Параметры эксперимента
cm
cm
cm
Расчёты и показатели в реальном времени
Расстояние до изображения v
--
Увеличение M
--
Характер изображения
--
Прибор
--
Вывод формул в реальном времени
Основная формула:
--Подстановка значений:
--Физическое состояние: --
Разбор типовых задач и анализ экзаменационных ошибок
Worked Problem
Условие задачи: A convex lens with f=10cm has a candle at u=15cm. What are the image characteristics and image distance v?
Пошаговый вывод формул:
- 1/f = 1/u + 1/v => 1/10 = 1/15 + 1/v => v = 30cm. Since f < u < 2f, image is inverted, magnified and real.
Worked Problem
Условие задачи: To observe an upright magnified virtual image using a convex lens of f=10cm, what range must object distance u satisfy?
Пошаговый вывод формул:
- Upright virtual images require object inside focal length (u < f). Distance must be between 0 and 10cm.
Рабочий лист для урока и домашние задания
Q1. Variant 1: As candle burns shorter, which way does the image shift on the screen? How to re-center it?
Answer Key: Candle flame lowers, so its inverted image on screen moves upward. Lower lens and screen or raise candle.
Q2. Variant 2: Why might an image fail to appear on the screen despite moving it along the bench? (List 3)
Answer Key: 1) Candle inside f (virtual image); 2) candle at focal point (parallel rays); 3) flame, lens, and screen centers not aligned at equal height.
Q3. Variant 3: How do parallel rays refract through a concave lens? Which vision defect does it correct?
Answer Key: Parallel rays diverge with extensions meeting at virtual focus. Concave lenses correct myopia (nearsightedness).
Часто задаваемые вопросы и типичные заблуждения
Will covering the bottom half of a lens show only half an image?
No! Every zone of the lens converges rays to form the complete image. Occluding half reduces light throughput by half, making image dimmer.
How to distinguish nearsighted vs farsighted glasses by eye?
Nearsighted glasses are concave lenses (thinner center, thicker edges, diminishes views); reading glasses are convex lenses (thicker center, magnifies).
When moving closer for a photograph, should the lens extend forward or retract backward?
Closer object (smaller u) produces further image (larger v). The lens must extend forward away from the sensor to keep focus.
If object distance u = 2f, what is image distance and magnification?
Image distance v = 2f and magnification M = 1 (inverted equal-size real image). It serves as the benchmark to measure unknown focal length.