Properties of light & how it can be used (Shadow (Earth's shadow…
Properties of light & how it can be used
Natural: optical phenomena = an interaction of light and matter
Optical phenomena occurs due to optical properties of the atmosphere, nature (other phenomena), objects, whether natural or human-made (optical effects), and of our eyes (Entoptic phenomena)
Bending or manipulating natural light?
Using a natural reflection - i.e. water, skin, sweat, ice
Earth's shadow (dark segment) is the shadow that Earth itself casts onto its atmosphere and into outer space
Umbra – the shadow's dark center portion
Penumbra – the lighter outer part of the shadow
Antumbra - the lighter part of a shadow that forms at a certain distance from the object casting the shadow
umbra, penumbra and antumbra
are three parts of a shadow, created by any light source after impinging on an opaque object
Eclipse - solar eclipse
Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.
Reflection from light, sound and water. Physics tells us for specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected. E.g. mirrors exhibit specular reflection.
Reflection - Light bounces off the surfaces like mirrors such that the angle of incidence is equal to the angle of reflection
Altering visual perception via light ad shadow
Artificially reproducing a natural light phenomena
Using natural light phenomena as inspiration to create a man-made phenomena
Properties of light
Refraction - bends/refracts when it changes speed. Refraction light travels faster in air, slow in water and slower still in glass
Dispersion - process in which light is separated into its colours due to the differences in degrees of refraction. E.g. how rainbows are formed
Diffraction Light spreads out after passing through/by an opening /edge. The opening must be very narrow for diffraction of light to occur. “Every cloud has a silver lining.”