Light
What is light?
https://www.strawpoll.me/20086756
https://www.youtube.com/watch?v=7u_UQG1La1o&t=121s
Electromagnetic Waves
Lights are electromagnetic waves. They are made up of magnetic field and
electric field.
They travel at 300,000 km/sec
Electromagnetic Spectrum
Reflection of Light
When light hits on the surface, it bounces off and
creates a reflection pattern.
For smooth surface, the angle of incident is equal to
angle of reflection.
Refraction of Light
When light passes through from medium to another medium, the speed of
light changes.
V = ƛf
When light pass through a medium, the frequency does not change but the
wavelength and speed changes.
Snell’s Law
Refractive Index
Speed of light in air is 300,000 km/s
Critical Angle
Convex lens
Diffraction
Bending of the light when it pass through a gap.
Transparent Materials
Objects
that allow light to pass through is
called transparent.
Electrons
Each
are connected to nucleus like spring.
spring will vibrate at their own
frequency, they are called natural frequency.
Lenses
Eyes Vs Camera
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