Visible Light 6.3.5

​Visible Light 6.3.5
Notebook Page 125

Poll

Topic: Shadow Illusion

Question: Do you think the size and shape of a pinhole in cardboard affects the image on a wall as light passes through it?

• yes, the shape of the hole will appear on the wall

• yes, the shape and the size will appear the same on the wall

• no, the shapes and size will all be the same

​The Shadow Illusion

Open Ended

According to the video, what is being projected on the wall?

​Vocabulary

• photon- a unit of light energy

• transmission- the movement of waves through a medium

• visible light- electromagnetic radiation that humans can see

• electron- subatomic particle with a negative charge

• particle- a small piece of matter

​How do all of the parts of your ear help you decode soundwaves?

​Check out the tiny ruler! What does mm stand for?

​

The stapes, or stirrup, is the smallest bone in the body!

​

Reorder

Reorder the following

• Sound waves travel into the ear through the ear canal

• The waves vibrate the eardrum

• The eardrum stimulates three small bones, which transfer the vibration to the cochlea

• From the cochlea, nerves carry signals to the brain, which decodes the sounds

1

2

3

4

• 1
• 2
• 3
• 4

​Visible Light Notes
Page 125

​Photons

A photon is an individual packet of light. Each day light reaches Earth from the Sun. When you turn on a light bulb, the filament produces photons that light a room. The screen of your laptop produces photons of light that form the patterns you recognize as words and pictures.

Photons of visible light have several distinct properties.

• Photons of light behave like transverse waves.

• Photons of visible light have wavelengths between 380 and 700 nm. (nm= nanometer or 1 billionth of a meter)

• Photons behave as both a wave and a particle.

• Photons can travel through some mediums via transmission.  

​Remember: mediums are air, water, solid objects

Draw

Based on research, scientists concluded that light sometimes behaves like a wave. Which of the following data supports the model of light as a wave?

​Light Transmission

One property of light is transmission. Transmission occurs when light waves pass through a medium. Light waves can pass through gases such as the atmosphere and liquids such as shallow water. Most solid matter prevents light transmission.
Example: Very thin sheets of solid matter, such as the specimens you view on microscope slides, allow some light to pass through.

​Can you think of other examples of light transmission?

​Let's draw this on the whiteboards!

​Greenhouse Effect

The greenhouse effect keeps Earth's temperatures warm enough for life to exist. When light waves enter the atmosphere, some of those waves bounce back into space.

However, gases in Earth's atmosphere called greenhouse gases trap some of the energy from light waves in the atmosphere. That energy becomes heat, which warms Earth's surface.

​Light Energy: energy from the Sun reaches Earth in the form of light waves.

​What are these? How do they work?

​How Does it Work? Solar Panels Video



Edio Lesson page 8

Multiple Choice

Solar panels are a technology that produces energy that people can use to power devices.

Which statement best describes the types of energy involved with solar panels?

• Solar energy is converted into electrical energy.
• Solar panels convert wind energy into electrical energy.
• Solar energy is stored as chemical energy in batteries.
• Solar panels only produce thermal energy.

Open Ended

Your eyes contain cells that detect light energy. Nerves send the information from the cells in your eye to your brain. Why can you not see when your eyes are closed?

Poll

Which concept did you understand the most today?

• visible light consists of photons

• photons sometimes behave like waves and sometimes behave like particles

• light passes through a medium during transmission

• the greenhouse effect keeps Earth warm

• solar panels convert light energy into electrical energy