Method, Variables, aim, hypo etc.....

Ms. Zhang if you are reading this, please know this is not blog 2, blog 2 is further down. I have changed my project since blog two and i put up the method of my new experiment for it.
Hypothesis

My hypothesis stated that the closer the light source, the stronger the light intensity.

Aim

To investigate whether distance effects the intensity of light from a light source.

Risky Assessment
Identify Light bulb
Assess If the light bulb is touched, it may burn the skin.
If the lamp was dropped, the bulb could break
Control Avoid touching the bulb at all times
Dispose Switch off the bulb when the experiment is over to allow it to cool down


Materials
Dick Smith Lux meter
A music stand
Sticky tape
Measuring Tape (at least 2 metres)
lamp with a lightbulb (lightbulb needs to be exposed)
Darkened Room (at least 1 by 2 metres in area)
A pen
A notebook
A computer
Excel(windows) program/Graphs (mac) program

Method
Setting up the equipment
1. An area of 1 by 2 metres was cleared up to conduct the experiment
2. A lamp, with an exposed bulb was connected to a power point and placed on one side of the area.
3. Books were placed under the lamp so the light bulb was 70cm from the ground
4. A music stand was set up directly opposite the lamp
5. The sensor was taped- to prevent movement- onto the bulb at an elevation of 70cm.
6. Measuring tape was positioned directly above the lamp and then taped down with sticky tape.
7. The sensor was positioned horizontally opposite to the light bulb at an interval of 10cm.
8. The lightbulb was then turned on.
9. After the light meter was turned on
10. A measurement was read from behind the stand.
11. Observations were recorded into the log book
12. The stand was pulled back another ten centimetres
13. Steps ten to twelve was repeated until a distance of 2 metres was reached
14. Steps ten to fourteen was repeated another three times to ensure reliability
The average luminosity for each distance was calculated


Controlled Variables
wattage of the lightbulb, the height at which the lamp stood, the height of the music stand, the length of the tape, the darkness of the room and the allocation of the lux meter

The independent variable was the distance between the light source and the sensor and the dependent variable will be the light intensity from the light source.