Classical vs modern Physics, fundamental forces, radioactivity, duality of light Wednesday, April 22, 2015

Unit 10: Atomic PhysicsWednesday, 4/22 Look at the pictures below and describe how they are similar and different.

Upcoming dates: Tuesday, 4/28 – open note atomic physics quiz (note: I will not accept any late work related

to atomic physics after the quiz has been taken) Wednesday, 5/13 – Rube Goldberg presentations (project is a test grade) Friday, 5/22 – Last day to turn in 6SW extra credit Tuesday, 5/26 – Bottle rocket launch (project is a test grade)) Thursday, 6/4 – 5th period final exam (8:35 to 10:30), 8th period final exam (10:45 to 12:45)

Classical vs. Modern Physics– 7 minutes Read notes from my webpage. Use the guiding question

below as you read.

What is the relationship between matter and energy? Which scientist(s) greatly influenced the concepts of classical

physics? What are the concepts commonly associated with classical

Physics? Why the shift from classical to modern physics. What was Plank’s role in this shift? In your own words describe what modern physics is and list

some areas of study. How are classical and modern Physics similar? How are classical and modern Physics different?

Classical vs. Modern Physics

Guiding questions:

1. What is the relationship between matter and energy? Matter has has a mass and takes up space. Energy is the ability to do work (can move or change matter). Energy is always conserved.

2. Which scientist(s) greatly influenced the concepts of classical physics? Newton – laws of motion James Maxwell – electromagnetism.

3. What are the concepts commonly associated with classical Physics? Dynamics (1-D and 2-D), statics, optics, sound, magnetism, electricity, conservation of energy.

Classical vs. Modern Physics Guiding questions:

4. Why the shift from classical to modern physics. Physicists began to make observations that could not be fully explained by classical Physics.5. Plank observed electromagnetic radiation being emitted and absorbed from black bodyWhat was Plank’s role in this shift? in discrete quanta (bundles of energy). Einstein used the idea of quanta to describe the photo electric effect.6. In your own words describe what modern physics is and list some areas of study. Physics at the subatomic level. 7. How are classical and modern Physics similar? They both explore the transformation of energy.8. How are classical and modern Physics different? Classical Physics explains motion on a macro level and modern Physics explains motion on a micro level.

Fundamental Forces – 10 minutes Access the resources on my webpage. Watch the video on fundamental forces (about 3

minutes). Review the fundamental forces notes. Guiding questions:

What are the four fundamental forces in nature? List is order of weakest to strongest.

What does gravity do? What happens to an element that has a weak

nuclear force? What causes an electromagnetic force? What does a strong nuclear force do?

Fundamental Forces – 10 minutes Access the resources on my webpage. Watch the video on fundamental forces (about 3 minutes). Review the fundamental forces notes. Guiding questions:

What are the four fundamental forces in nature? Gravitational, weak nuclear force, electromagnetic force, strong nuclear force.

What does gravity do? Causes objects to be attracted to each other.

What happens to an element that has a weak nuclear force? Causes the element to be radioactive.

What causes an electromagnetic force? Attraction between a protons (positive) and electrons (negative).

What does a strong nuclear force do? Holds the nucleus together.

The atom and radioactivity – 20 Minutes Review the notes on my webpage and

complete the note guide. When finished -

Show me your work and I will enter your grade in the grade book.

Check the key.

Duality of light Read the handout. On the back of your warm-up sheet

respond to the following: What is the dual nature of light and why

does it exist. Use academic vocabulary and complete sentences. Must be at least three sentences.