The classroom rules instruct students to be kind, polite, courteous, and respectful towards others and property. Students are directed to listen to teachers and classmates, follow directions, and raise their hand to speak. Students are also told to be safe.

1. CLASSROOM RULES:
• 1. Be kind, polite, and courteous to others.
• 2. Be respectful of classmates, teachers, and
property.
• 3. Listen to the teacher and classmates and follow
directions.
• 4. Be safe.
• 5. Raise your hand when you would like to speak

2. Sir Isaac Newton believed that light behaves
like a particle while Christian Huygens
believed that light behaves like a wave.

4. 1. The students will divide into three groups.
2. Each group must have one representative to give their
output on the board.
3. Each group will form an image and once they’ve
done, a representative of each group will paste it on
board and tell to the class what the image shows.
4. Students give 5 minutes to work on the puzzle.
INSTRUCTIONS:

6. 1. What are the three pictures shows?
2. Is there any similarities/differences
about the three pictures?

7. 1. What are the different sources of light?
2. Define what is Natural light/Artificial
light.
3-5. Cite some examples of sources of light.

8. Light is electromagnetic radiation within a
certain portion of the electromagnetic
spectrum. The word usually refers to visible
light, which is the portion of the spectrum
that can be perceived by the human eye.

9. ELECTROMAGNETIC
SPECTRUM
The electromagnetic spectrum is the range of frequencies (the
spectrum) of electromagnetic radiation and their respective
wavelengths and photon energies.

11. NATURAL LIGHT:
The universe is filled with objects that emit light. Some
of the light from these sources reach the earth. The
following things in nature have the ability to emit light.

12. ARTIFICIAL LIGHT:
Artificial light, as opposed to natural light, refers to any light source
that is produced by electrical means. Artificial lighting has many
different applications and is used both in home and commercially.
Artificial lights are available in a wide variety of shapes, sizes, colors
of light emitted, and levels of brightness.

13. How will you compare the
brightness of the two unknown
sources?

14. Oil Spot
Photometer
Oil Spot Photometer is used to compare the
brightness of two light sources using an oil spot on a
white card. When an oil spot on a card is illuminated
equally from both sides, it mysteriously disappears,
then the two sources have an equal light to emit.
This allows you to compare the brightness of the
light sources on either side of the card.

15. POST-TEST
1.What are the different sources of light?
2.Define what is Natural light/ Artificial light.
3-5. Cite some examples of the sources of light.