Light Energy: Transfer of Light Energy

Light Energy

Transfer of Light Energy

Start

Learning objectives

Today we will learn...

To construct an explanation of energy transformation with light energy

Apply scientific ideas to design, test, and refine a device that converts energy from one form to another.

Essential Question

How does light transfer energy?

Vocabulary

Words to know in this lesson:

photon

wavelength

The distance from one top of a wave to the top of the next wave.

A ting bundle of energy though which light travels.

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solar cell

frequency

A device that uses light or heat from the sun to produce electrcity.

The number of wavelengths that pass a reference point in a given amount of time.

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Light Energy

Previous knowledge on light enery

Watch this short video to review what is light energy.

Let's Explore

Can you find another source of energy than batteries to make electric device work? You will explore by making simple circuits using an energy source other than batteries.

Hypothesis

Make a Prediction

What do you think will happen when you expose a solar cell to different levels of light?

Experiment

Materials

• solar cell

• electrical wires with clamps

• small bulb

Experiment

Investigation steps

• Begin by setting your solar cell in a location with very bright light.
• Connect each of the lead wires from the solar cell to the connectors on the lightbulb.
• Record Data Record your observations of the lightbulb.
• With lightbulb still connected to the solar cell, block the light shining on the solar cell.
• Record your observation of what happened when the light was blocked.

Analyze

Let's discuss

Did your results match your prediction?

Conclusion

Construct an explanation

Based on your observations, what do you think the purpose of a solar cell is?

Explain

Read pages 336-337 in your Science Handbook.

Evaluate

Light is made of _____ electric and magnetic fields.

vibrating

turning

spinning

Evaluate

What is the distance between one peak to the next peak in a transverse wave?

photon

frequency

wavelength

Evaluate

What is the number peaks that pass a point each second of a transverse wave?

frequency

solar cell

wavelength

Evaluate

Light can travel in both waves and particles?

True

False

Evaluate

A tiny bundle of energy through which light travels is called ________.

frequency

photon

wavelength

Evaluate

A _____ uses light or heat from the sun to produce electrcity.

solar cell

frequency

photon

Closure

Great Job Today!

Try again...

Try again...

Creating a Circuit:

Be sure to connect metal clamps of the wire to the metal tabs on the lightbulb connector.

Creating a Circuit:

Connect metal clamps to metal tabs of lightbulb connector and metal portion of solar cell wires.

Creating a circuit:

Connect wire clamps to the exposed portion of the solar cell's wire.