Light+Sensor

=**PPPo Vernier Light Sensor**=

**Description:**
This specific sensor is used to measure light intensity. When using the sensor, it produces a voltage that is comparable to the light intensity that is being measured. This sensor would be a great tool in a science classroom where it would be able to carry out actions such as solar energy studies, reflectivity studies, plant growth in regards to light source, etc.

**Necessary Equipment:**

 * Vernier Light Sensor
 * Vernier Go!Link
 * Computer
 * Software installed onto computer (Logger Lite)

**Getting Started**:
1) The Light Sensor does not need to be calibrated.

2) Connect the Light Sensor to the Go!Link 3) Insert the Go!Link into the USB of the computer 4) Start Logger Lite on the computer

5) Logger Lite will identify the Light Sensor and automatically load the data-collection setup.

**Using The Tool:**
6) On the left side of the sensor, there is a switch with three settings: 0-6000, 0-600, and 0-150,000. The 0-600 lux range is the most sensitive, and is best when used for low levels of illumination. The 0-6000 lux range is best for indoor light levels. The 0-150,000 lux range is best for measuring sunlight. We will be working with the 0-6000 lux range, for indoor light use. Make sure that the switch is on this setting.

7) Hold the red-tipped wand close to the light you want to measure..



8) In the bottom left hand corner of the screen, you will be able to see the changing amount of illumination that the light sensor is detecting. 9) Press the green "Collect" button if you wish to record the amount of illumination. The software will record the varying illumination as well as the time that you take to collect this sample. 10) The left hand side of the screen will have the time (in seconds) and the illumination (in lux) in a graph for your use. 11) When you wish to stop, click the red "Stop" button to preview your data.

12) You can repeat these steps using light sensor in different areas to record window light, overhead light, computer screen light, etc.

**Resources:**
For tech facilitators: http://www2.vernier.com/booklets/ls-bta.pdf For the classroom: http://mechatronics.poly.edu/smart/html/home/projIdeas.html

http://education.ti.com/calculators/downloads/US/Activities/Detail?ID=3995