Reflection of Light
What happens when light hits a smooth, shiny surface?
It reflects in one direction (regular reflection).
What is refraction of light?
The bending of light when it passes from one medium to another.
What is dispersion of light?
Splitting white light into its seven colours.
Aluminium symbol
Al
This carbohydrate is produced during photosynthesis and used by cells for respiration.
Glucose
State the law of reflection.
Angle of incidence = angle of reflection.
Does light speed up or slow down when it enters a denser medium?
It slows down.
Which device can show dispersion of light?
A glass prism.
Electronic configuration of Lithium
2.1
This food test uses iodine solution to detect starch in a sample.
Iodine
Why can you see your face clearly in a mirror but not on a wall?
A mirror gives regular reflection; a wall scatters light.
Explain why a pencil in a glass of water looks bent.
Light rays change direction due to refraction at the water–air surface.
Name the seven colours of the spectrum.
Red, Orange, Yellow, Green, Blue, Indigo, Violet (ROYGBIV).
Subatomic particles of atoms
Proton, Neutron and Electron
This biological catalyst speeds up chemical reactions in living organisms.
Enzyme
What are the incident ray, reflected ray, and normal?
Incident ray = incoming light; Reflected ray = bounced light; Normal = line at right angles to surface.
Give one example of how refraction is useful in everyday life.
Eyeglasses, cameras, microscopes, lenses in projectors, etc.
Which colour of light bends the most during dispersion?
Violet
Charge of Neutron
Neutral
This gas is taken in by plants during photosynthesis.
Carbon dioxide
If the angle of incidence is 35°, what is the angle of reflection?
35°
What happens to the speed and direction of light when it passes from air into glass?
It slows down and bends toward the normal.
What is the name of the band of colours produced during dispersion?
Spectrum
Which scientist came up with idea of "Plum pudding model"
This green pigment in plant cells absorbs light energy for photosynthesis.