Introduction to light OALH

Do Now

1

Name the wave that has vibrations which go perpendicular to the direction of the travel

1

State one type of ionising EM wave (waves that can damage cells)

1

Draw a sound wave with a low frequency and high amplitude.

1

Name the salt formed when magnesium reacts with nitric acid (hint: metal first and then a name related to the acid used)

1

Give the unit we use for wave speed.

1

Describe the difference between longitudinal and transverse waves.

Checking for understanding-luminous or non-luminous

1

What is the name of the diagram we use to show the path of light waves travelling from a source to a detector?

1

what does tranparent, translucent and opaque mean?

LCWC

1

What type of wave is a light wave?

1

What isa luminous object?

1

What isa non-luminous object?

1

Define “transparent”.

1

Define “opaque”.

1

Define “translucent”.

Re-call quiz

1

1)Which is an example of a luminous object?

1

Which is an example of a non-luminous object

1

If an object is transparent…

1

If an object is translucent…

1

If an object is opaque…

We Do

1

You Do

1

Challenge: application tasks

1

Draw a ray diagram to show how Nadia could see Joan
How does the glass window help to reduce the number of accidents?

1

Extra Challenge Q's

1

We can see stars because they are light sources. They give out their own light. Satellites do not give out their own light. Explain why satellites can be seen in the clear night sky.

1

Sometimes a satellite suddenly stops being visible. However, you can usually see it again in another part of the sky later the same night. This can happen when there are no clouds in the sky and the satellite is overhead.
Why does the satellite suddenly stop being visible?

Plenary

1

Name the wave that has vibrations which go perpendicular to the direction of the travel

State one type of ionising EM wave (waves that can damage cells)

Draw a sound wave with a low frequency and high amplitude.

Name the salt formed when magnesium reacts with nitric acid (hint: metal first and then a name related to the acid used)

Give the unit we use for wave speed.

Describe the difference between longitudinal and transverse waves.

What is the name of the diagram we use to show the path of light waves travelling from a source to a detector?

what does tranparent, translucent and opaque mean?

What type of wave is a light wave?

What isa luminous object?

What isa non-luminous object?

Define “transparent”.

Define “opaque”.

Define “translucent”.

1)Which is an example of a luminous object?

Which is an example of a non-luminous object

If an object is transparent…

If an object is translucent…

If an object is opaque…

Draw a ray diagram to show how Nadia could see JoanHow does the glass window help to reduce the number of accidents?

We can see stars because they are light sources. They give out their own light. Satellites do not give out their own light. Explain why satellites can be seen in the clear night sky.

Sometimes a satellite suddenly stops being visible. However, you can usually see it again in another part of the sky later the same night. This can happen when there are no clouds in the sky and the satellite is overhead.Why does the satellite suddenly stop being visible?

Draw a ray diagram to show how Nadia could see Joan
How does the glass window help to reduce the number of accidents?

Sometimes a satellite suddenly stops being visible. However, you can usually see it again in another part of the sky later the same night. This can happen when there are no clouds in the sky and the satellite is overhead.
Why does the satellite suddenly stop being visible?