Óptica geométrica e ondas · GCSE Physics Topic 6
Simulador de dispersão em prismas e arco-íris
Simulador de dispersão da luz em prismas ópticos e espectro do arco-íris
- No navegador
- Sem cadastro
- Dedução ao vivo
- Modo projetor
- Folha de exercícios A4
Janela de simulação 3D● 60 FPS
Variáveis de controle do experimento
°
°
Deduções e métricas em tempo real
Ângulo de desvio do vermelho
--
Ângulo de desvio do violeta
--
Dispersão Δδ
--
Ângulo de desvio mínimo
--
Dedução de fórmulas em tempo real
Fórmula fundamental:
--Substituição de valores:
--Estado físico: --
Exemplos clássicos e armadilhas de exame
Worked Problem
Problema: Why does red appear on top and violet on bottom after prism dispersion?
Derivação passo a passo:
- Violet has shortest wavelength and highest refractive index, experiencing greater deviation than red.
Worked Problem
Problema: What are the 3 primary colors of light vs pigment? What colors do their equal mixtures produce?
Derivação passo a passo:
- Primary light: Red, Green, Blue (additive, mixes to white). Primary pigment: Cyan, Magenta, Yellow (subtractive, mixes to black).
Folha de investigação em aula e exercícios
Q1. Variant 1: What invisible rays lie outside red and violet ends? Give practical applications.
Answer Key: Outside red is infrared (thermal imaging, remote controls). Outside violet is ultraviolet (sterilization, counterfeit detection).
Q2. Variant 2: How did Newton prove that prisms do not dye white light?
Answer Key: 1) Monochromatic ray test: Isolated red light does not split in a second prism; 2) recombination: an inverted second prism merges colors back to white.
Q3. Variant 3: Under a magnifying glass, what 3 subpixel phosphor dots compose a color TV screen?
Answer Key: Red, Green, and Blue (RGB) dots. Modulating their individual intensities synthesizes all visible colors.
Perguntas frequentes e erros comuns
Why is the sky blue and sunset red?
Rayleigh scattering. Short blue wavelengths scatter strongly across the sky. At sunset, light traverses thicker atmosphere; only long red wavelengths penetrate.
Why are rainbows only visible looking away from the sun?
Rainbows are formed by raindrops retro-reflecting sunlight at ~42°. The observer must face away from the sun toward the rain curtain.
Do infrared thermometer guns shoot infrared rays at your head?
No! All objects above absolute zero emit thermal infrared radiation. The gun passively absorbs body infrared photons to compute temperature.
What determines the color of transparent vs opaque objects?
Transparent: the color of light transmitted (red glass passes red). Opaque: the color of light reflected (green leaves reflect green). White reflects all, black absorbs all.