Science(Fireworks topic)🧬🧪

• Cornea -Bends light into eyes
• Iris -The coloured bit of the eye and it controls the size of the pupil
• Pupil -Controls light entering eyes
• Lens -Focuses light onto retina
• Retina -A row of light sensitive cells that turns light into electrical impulses
• Optic Nerve -Carries electrical signals from your eyes to your brain
• Having 2 eyes is better then just having one because when we look at something both of our eyes see something slightly different so our brain puts 2 pictures together so we can see 3 dimensions
• Having 2 eyes enables us to judge distance
• Light is a form of energy and travels as a wave
• Light always travel in a straight line
• Shadows are formed when objects prevent light from passing through it
• The angle of incidence is the angle measured between the incident ray and normal
• The angle of reflection is the angle measured between the reflected ray and normal
• For a flat mirror the angle of incidence equals to the angle of reflection
• When light passes through from air to into glass its direction changes
• The angle of refraction is smaller then the angle of incidence
• Lenses can be described as a convex or concave lens
• When light passes through a convex lens the rays converge to a point called the focus point
• When light passes through a concave lens the light rays diverge (spread out)
• The primary colours are red, blue and green
• When we mix them together we get some different colours
• Blue + Green = Cyan
• Blue + Red = Magenta
• Red + Green + Blue = white
• Light is a type of electromagnetic radiation and travels as a wave carrying energy
• There are 7 members of the electromagnetic spectrum
• The type of radiation depends on the frequency and wave length of the wave
• They all travel at the speed of light (300,000,00 M/S)
• R stand for - Radio waves
• M stands for - Microwaves
• I stands for - Infra-red
• V stands for - Visible light
• U stand for - Ultra-violet
• X stand for - X-rays
• G stands for - Gamma rays
• The start is long wavelength and low frequency and the end is short wavelength and high frequency
• The focal length is the distance between the lens and the focus point
• When light enters a triangular glass block the white light splits up into different colours called a rainbow
• The order of the colours are red, orange ,yellow, blue, indigo and violet
• Radio waves - Have the longest wavelength in the electromagnetic spectrum. These waves can be longer than a football pitch. Radio wave aren't just used to bring music to your radio they also carry signal for your television