Light Meter Usage and Functions

The video tutorial from the Faculty of Environments' Ecology Lab demonstrates how to use a light meter to measure light intensity in a specific area. It explains the purpose of light meters, the settings available (lux and foot candle), and provides step-by-step instructions on how to use the device to measure both incoming and outgoing light. The tutorial also covers how to adjust the range for accurate readings and concludes with instructions on how to properly care for the device after use.

What is the primary purpose of using a light meter in scientific studies?

• To measure humidity

• To measure temperature

• To measure light intensity

• To measure sound intensity

What does the 'lux' setting on a light meter measure?

• Watts per square meter

• Lumens per square meter

• Kelvin

• Foot candles

How can you tell if the light meter is set to measure in foot candles?

• The screen displays 'lux'

• The screen displays 'cd'

• The screen displays 'fc'

• The screen displays 'lm'

What should you do if the light meter displays a value of 1 while measuring incoming light?

• Replace the battery

• Decrease the range

• Increase the range

• Turn off the device

What is the purpose of the 'hold' button on the light meter?

• To turn off the device

• To reset the device

• To keep the current reading displayed

• To change the measurement unit

Why is it important to ensure the photo detector is not shaded while taking measurements?

• To save battery life

• To ensure accurate readings

• To avoid damage to the device

• To prevent overheating

When measuring outgoing light, how should the photo detector be positioned?

• Facing upwards

• Facing downwards

• Facing the light source

• Facing sideways

What should you do if the light meter shows a value of 1 while measuring outgoing light?

• Ignore the reading

• Cover the photo detector

• Change the range

• Turn off the device

What is the final step after using the light meter?

• Put the lid back on the photo detector

• Change the battery

• Leave it on

• Reset the device

What should you do with the light meter after turning it off?

• Leave it in the sun

• Disassemble it

• Put it back in its case

• Leave it on the table