Question

use with textbook pages 276 to 285.
light
vocabulary
chemiluminescence
incandescent
luminescence
electromagnetic waves
energy
fluorescence
frequency
electric discharge
electromagnetic spectrum
visible light
wave
wavelength
use the terms in the vocabulary box to fill in the blanks. you can use each
term more than once. you will not need to use every term.

1. light is a form of ____.
2. the light emitted by a hot object is called ____.
3. the light emitted by an unheated object is called ____.
4. other forms of ____ can be converted into light.
5. light released during chemical reactions is called ____.
6. the sun is an example of ____ light. it converts chemical energy into

light energy.

1. light travels like a ____.
2. the distance between two peaks of a wave is called the ____.
3. ____ includes visible light, ultraviolet, and radio waves.
4. an ____ shows the electromagnetic waves in order of

wavelength.

1. radio waves have a longer ____ than visible light does.
2. the waves of ____ are the only waves of the electromagnetic

spectrum that you can see.

Explanation:

1. Light is a form of energy. Energy is a fundamental concept in physics related to the ability to do work. Light has energy that can be used in various processes like photosynthesis.
2. Incandescence is the light emitted by a hot object. For example, a heated filament in an incandescent bulb emits light due to its high temperature.
3. Luminescence is the light emitted by an unheated object. This can occur through processes like fluorescence or phosphorescence where materials emit light without being heated to a high temperature.
4. Other forms of energy can be converted into light. For instance, electrical energy can be converted into light in a light - emitting diode (LED).
5. Light released during chemical reactions is called chemiluminescence. Fireflies produce light through a chemical reaction, which is an example of chemiluminescence.
6. The Sun is an example of incandescence. The Sun's high - temperature plasma emits light.
7. Light travels like a wave. This is a fundamental property of light, and it has wave - like characteristics such as wavelength and frequency.
8. The distance between two peaks of a wave is called the wavelength. Wavelength is an important parameter in describing waves, including light waves.
9. The electromagnetic spectrum includes visible light, ultraviolet, and radio waves. It is a range of all types of electromagnetic radiation.
10. An electromagnetic wave shows the electromagnetic waves in order of wavelength. Electromagnetic waves have both electric and magnetic field components.
11. Radio waves have a longer wavelength than visible light does. This is a characteristic property of different types of electromagnetic waves.
12. The waves of visible light are the only waves of the electromagnetic spectrum that you can see. Our eyes are sensitive to a specific range of wavelengths in the electromagnetic spectrum, which we call visible light.

Answer:

1. energy
2. incandescence
3. luminescence
4. energy
5. chemiluminescence
6. incandescence
7. wave
8. wavelength
9. electromagnetic spectrum
10. electromagnetic wave
11. wavelength
12. visible light