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Brainlag Learn / GCSE Physics

Lenses, visible light, sound and black bodies

Reflection and the glass block practical, colour and filters, lenses and magnification, sound and echoes, ultrasound and seismic waves, and black body radiation (Physics only).

Lessons

  1. Reflection, and the glass block practicalThe law of reflection, smooth and rough surfaces, and the required practical that traces rays through a glass block. 25 min, with the Refraction simulation, free, Physics only
  2. Colour and filtersWhy objects look coloured, what opaque, transparent and translucent mean, and what filters and coloured lights do. 20 min, free, Physics only
  3. Lenses and magnificationConvex and concave lenses, ray diagrams, real and virtual images, and magnification = image height ÷ object height. 25 min, with the Lenses simulation, Plus, Physics only
  4. Sound waves, hearing and echoesHow sound travels through solids, liquids and gases, how the ear works and why hearing has limits, and distances from echoes. 25 min, Plus, Physics only, Higher tier
  5. Ultrasound and seismic wavesUsing echoes of ultrasound to scan bodies and measure depths, and what P-waves and S-waves reveal about the inside of the Earth. 25 min, Plus, Physics only, Higher tier
  6. Black body radiationEvery object emits and absorbs infrared, perfect black bodies, how temperature changes the radiation, and the balance that sets the Earth's temperature. 25 min, Plus, Physics only

Practise and test

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