1. بسم الله الرحمن الرحيم الجمعية العلمية السعودية للعلوم الفيزيائية
1434هـ
بسم الله الرحمن الرحيم

2. Light and heat (different types of light bulbs)

3. Definition Heat : Visible light:
is energy transferred from one body to another
(commonly referred to simply as light) is electromagnetic radiation that is visible to the human eye
Visible light:

4. The difference between the light and heat\
1- heat is not electromagnetic radiation
1- All electromagnetic radiation is light
2- is a method for the transfer of energy
heat is NOT light.

5. methods of energy transmission Electromagnetic radiation
Heat
Electromagnetic radiation
Matter transfer

6. Light is simply a name for a range of electromagnetic radiation
Conduction+ convection
Heat:
Light is simply a name for a range of electromagnetic radiation

7. What is electromagnetic radiation?
- Electromagnetic radiation has a dual nature as both particles and waves

8. How light is produced?
All light comes from atoms, got the power, either by absorbing light from another source; either colliding with other particles. The corn that has gained this extra energy, called excited. They usually remain excited, for a short period, then landing, giving extra energy atom, or send a light, carrying excess energy. The amount of energy required to excite the atoms, and the amount of energy emitted in the form of light, depending on the atoms.

9. light bulbs produced by two methods:
Thermal radiation of objects, by raising the body temperature so until it emits " visible" electromagnetic radiation
Using other methods, such as what is happening in florescent bulbs, which produces ultraviolet in the beginning and then converted it to visible rays by using phosphorus

10. Types of Light Bulbs and Their Uses:
Incandescent
Compact Fluorescent Lamps
Halogen
High-Intensity Discharge Lamps
Fluorescent
Low-Pressure Sodium Lamps

11. Incandescent
Incandescent bulbs produce a warm light that is very steady and stable  
Incandescent bulb be less costly
Incandescent bulbs are the most inefficient bulb

12. It has a life of a little bit longer than an incandescent
Halogen
Halogen bulbs are based on the same principle as incandescent bulbs
incandescent bulbs are filled with an argon/nitrogen mixture
Halogen bulbs are filled with krypton gas  
It has a life of a little bit longer than an incandescent
must not be touched

13.  Fluorescent The main benefit of a fluorescent bulb is its long life
1- Fluorescent bulbs are very efficient and produce little heat
2- They are useful for lighting up large areas

14. Compact Fluorescent Lamps
Compact fluorescent lamp (CFL) bulbs are rapidly replacing the standard incandescent for home use 
1- Use CFL bulbs to replace all your incandescent bulbs as they will save you a bit of money on your electric bill
2- Most CFL bulbs cannot be used with dimmers and can last up to hours

15.  High-Intensity Discharge Lamps
High-pressure sodium (HPS) lamps dominate this category. 
1- Sodium bulbs are very high efficiency
2- HPS lamps produce large amounts of light and can be used to light up very large areas

16.  Low-Pressure Sodium Lamps Low pressure sodium (LPS) lamps.
1- used when the highest efficiency light is needed
2- There is a warm up time before full brightness
3- Most LPS lamps are used for driveways, parking lots and pathways because they are much better suited for outdoor