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Similar to Ch.12.less.12.how does light travel and interact with matter (20)
Ch.12.less.12.how does light travel and interact with matter
- 4. Light can travel through vacuum.
Speed of light in vacuum is faster than
its speed in solid, liquid or gas.
- 5. Distance between one peak
and the next in a wave.
To calculate the speed of a wave:
Speed = Wavelength x frequency
- 9. Position of the SHADOW depends upon
the position of the light source.
Example:
- 14. To change the size of the shadow, move
closer or away from the light source.
- 15. How do we see objects?
Light hits the objects and scatters (we
see objects).
- 20. The image in a mirror is clear because
most of the light is reflected off the
mirror’s smooth surface.
- 21. Look at the spoon in the glass of water.
Is the spoon broken?
- 22. The spoon is not broken.
When light enters a different medium it
bends and when it is leaving it bends to the
opposite side again.
- 23. Bending of light while passing from on
substance to another is called
REFRACTION.
- 28. When white light passes through a prism it
comes out as a spectrum (7 colors of
rainbow)
- 31. Red light has long wavelength.
Violet light has Short wavelength.
The way we see colored objects
depends on the color that is reflected.
- 33. The apple is red so it absorbs all light
and red light is reflected.