optics gr 10

What is light?

• Atom absorbs energy

• The electron absorbs this energy and jumps up to another orbital (further away from nucleus)

• The electron falls back to its original position and reclasses light

What is bioluminescence?

• Green fluorescent protein GFP

• Exhibits bright green fluorescent when exposed to blue light

• originally discovered in jellyfish

• light created naturally

What is incandescent?

• light can be produced when objects are heated to a very high temperature.

• Example, old incandescent lightbulb made of tungsten with an electricity run through this wire it heats up and glows making it work.

What is fluorescent?

• Fluorescent light is light that can be produced when an object is exposed to a UV radiation

• Example fluorescent lightbulbs in class

What is phosphorescent?

• Substances that are phosphorescent absorb ultraviolet light (the type of light that we can see with)

• Example any object that goes in the dark

What is triboluminescence?

Triboluminescence is a form of light produced through friction. This breaks the chemical bonds in the material which gives off light. We tend to see triboluminescence when certain crystals are rubbed together.

What is Chemiluminescence?

Chemiluminescence is when light is produced through a chemical reaction without increasing the temperature. A cool light is produced

• example bioluminescence

• example is the use of luminal in crime scenes or glow sticks.

What is electric discharge?

When an electric current runs through air or gas light can be produced

• lightning and neon signs

What acronym can you use to remember the different ways that like can be produced?

Bright Ideas For Producing Cool Types of Energy (BIFPCTE)

Numbers 1-9 are?

Significant Digits (s.d.)

Sandwiched 0’s are? (ex. 1007, 7.012)

s.d.

350 has how many significant digits?

2

1000 has how many significant digits?

1

18 700 has how many significant digits?

3

Is 350.0 a whole number?

No

Is 1000.0 a whole number?

No

If it is a decimal number, the zero’s behind the #

Count as s.d.

Final asnwer has to be presented with the ____ ________ of the fraction

least s.d.

ex. One sd, means you round your answer

SALLT sands for?

Size

Attitude: inverted (upside down)) Not inverted (right side up)

Location: in front or behind mirror

Laterally inverted: flipped side ways or not

Type: real or virtual