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P14 Light (Lenses (A real image is formed by a convex lens if they object…
P14 Light
Lenses
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A concave lens makes parallel rays spread out as if they had come from a point called the principal focus
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Light and Colour
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A transparent object lets all the light that enters it pass through it and does not scatter or refract the light inside the object
The colour of a surface depends on the pigments of the surface materials and the wavelengths of light the pigments absorb
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Using Lenses
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When an object is placed between a convex lens and its principal focus, the image formed virtual upright, magnified and on the same side of the lens as the object
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Refraction of Light
When a light ray refracts as it travels from glass into air, the angle of refraction is more than the angle of incidence
When a light ray refracts as it travels from air into glass, the angle of refraction is less than the angle of incidence
Refraction is the change in direction of waves when they travel across a boundary from one medium to another