# Analyze electromagnetic radiation and the electromagnetic spectrum.

## Definition

Analysis should

- explore the relationship between wavelength and frequency across the electromagnetic spectrum
- include the application of the inverse square law to electromagnetic radiation
- differentiate between wave theory and particulate theory.

## Process/Skill Questions

- How are wavelength, energy, and frequency related?
- What is the difference between radio waves and X-rays?
- How does the frequency for an AM radio station vary from an FM station?
- When would you apply Planck’s constant?
- When would you apply Einstein’s theory?

## Related Standards of Learning

## English

### 12.5

The student will read, interpret, analyze, and evaluate a variety of nonfiction texts.

- Use critical thinking to generate and respond logically to literal, inferential, and evaluative questions about the text(s).
- Identify and synthesize resources to make decisions, complete tasks, and solve specific problems.
- Analyze multiple texts addressing the same topic to determine how authors reach similar or different conclusions.
- Recognize and analyze use of ambiguity, contradiction, paradox, irony, overstatement, and understatement in text.
- Analyze false premises claims, counterclaims, and other evidence in persuasive writing.

## Mathematics

### AII.10

The student will represent, create, and solve problems, including practical problems, involving inverse variation, joint variation, and a combination of direct and inverse variations.

### T.3

The student, given one of the six trigonometric functions in standard form, will

- state the domain and the range of the function;
- determine the amplitude, period, phase shift, vertical shift, and asymptotes;
- sketch the graph of the function by using transformations for at least a two-period interval; and
- investigate the effect of changing the parameters in a trigonometric function on the graph of the function.

## Science

### PH.9

The student will investigate and understand that different frequencies and wavelengths in the electromagnetic spectrum are phenomena ranging from radio waves through visible light to gamma radiation. Key concepts include

- the properties, behaviors, and relative sizes of radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays;
- wave/particle dual nature of light; and
- current applications based on the respective wavelengths.

### PH.10

The student will investigate and understand how to use the field concept to describe the effects of gravitational, electric, and magnetic forces. Key concepts include

- inverse square laws (Newton’s law of universal gravitation and Coulomb’s law); and
- technological applications.