Óptica geométrica y ondas · GCSE Physics Topic 6
Simulador de espejos planos y periscopios
Simulador de reflexión en espejos planos y periscopios: imagen virtual simétrica
- Cálculo en cliente
- Sin registro
- Derivación en vivo
- Modo proyector
- Hoja de trabajo A4
Ventana de simulación 3D● 60 FPS
Variables de control del experimento
cm
cm
cm
Derivaciones y métricas en tiempo real
Distancia imagen s'
--
Altura de la imagen H'
--
Longitud mínima del espejo de cuerpo entero
--
Simetría y tipo de imagen
--
Derivación de fórmulas en tiempo real
Fórmula básica:
--Sustitución de valores:
--Estado físico: --
Ejemplos clásicos y análisis de errores en exámenes
Worked Problem
Problema: A 1.6m person stands 2m before a plane mirror. What is image height, distance between person and image, and effect of stepping 1m back?
Derivación paso a paso:
- Image height is 1.6m. Distance to image is 2+2=4m. Stepping 1m back leaves image height strictly unchanged at 1.6m.
Worked Problem
Problema: Why use a transparent glass plate instead of an opaque mirror in plane mirror experiments? Why identical candles?
Derivación paso a paso:
- Glass allows seeing reflection while viewing through to locate image position. Identical candles test size equality via equivalent substitution.
Hoja de indagación en clase y tareas
Q1. Variant 1: If the glass plate is tilted instead of vertical, what happens to the second candle?
Answer Key: The second candle cannot align with the image on the tabletop because tilting raises or depresses the image plane.
Q2. Variant 2: A clock reflected in a plane mirror shows 9:25. What is the actual time?
Answer Key: Plane mirror reflection reverses left-right. Symmetrical time calculation: 12:00 - 9:25 = 2:35.
Q3. Variant 3: Walking with your back to the moon after rain, is the brighter puddle or dry ground?
Answer Key: Both follow reflection laws. With back to moon, water reflects light away (looks dark); rough ground scatters light back into eyes (looks bright).
Preguntas frecuentes y errores conceptuales
Why can't a plane mirror virtual image be captured on a screen?
Virtual images are cognitive extrapolations of diverging reflected rays; no real photons focus behind the mirror.
Why do car side mirrors use convex mirrors instead of plane mirrors?
Convex mirrors diminish image size but substantially expand the field of view, minimizing blind spots.
In a corner reflector with two 90° perpendicular mirrors, is your image flipped or normal?
It shows your true unflipped perspective! Two successive reflections flip left-right twice, preserving true handedness.
Why does full-body viewing require at least half your height regardless of distance?
Reflected sightlines to head and feet form similar triangles with the mirror; the required aperture is a midline exactly 1/2 your height.