Transcript Lecture light

“HOMEWORK“ TASKS
Italy:
Explain the physical features of light. Make
experiments to give proof.
Finland:
Present the interrelationship between light and
colours. Support your answers with some
experiments.
Poland:
Explain the importance of light in the field of
economy, with reference to your own country.
Latvia:
Explain the biological importance of light. Refer to
light as an eco-factor in the fields of flora and fauna.
Germany:
Explain what influence light has on the psyche and
activity of the human being.
ALL CATS ARE GREY BY NIGHT.
The same picture – differently illuminated
WAVE RANGES OF LIGHT
Sir Isaac Newton
Thomas Young
Christiaan Huygens
LIGHT AS WAVE
REFLECTION
Incident
ray
normal
REFLECTION
Refected
ray
Transmitted
ray
SCATTERING
ABSORPTION
REFRACTION / DOUBLE REFRACTION
OPTICAL ACTIVITY
PHOTOELECTRIC EFFECT
DISPERSION OF LIGHT
Continuous spectrum
400nm
700nm
sun
THE ROSE

Physicist …
ADDITIVE MIXING OF COLOURS
Normal colour photo
The green component
is missing.
Cones for red
are missing.
Cones for blue are
missing.
PHILOSOPHICAL APPROACH
Naïve realism
COLOURS FROM DIFFERENT
PERSPECTIVES
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physics: spectrum , reflection, dispersion
chemistry: dyestuffs
arts and culture: colour symbolism, Pointillism, color
field painting
physiology of senses: cones, brain areals
psychology: chromotherapy, colour vision test,
multiprocessing, complementary colours, afterimages
philosophy: naive realism versus constructivism