Astronomy

1/ Light carries radioactive energy that it can exchange with matter

Power is the rate of energy transfer, measured in watts 1 watt = 1 joule/s

2. 2. A spectrum is the result of dispersing a beam of electromagnetic radiation so that components of different wavelengths are separated. We see a spectrum by passing light through a prism and seeing a rainbow of color (red, orange, yellow, green, blue, and violet).

When we pass white light through a prism, it disperses into a rainbow of color that we call a spectrum

3. Emission: a light bulb emits visible light

Absorption: Place hand near an incandescent light bulb, your hand absorbs some of the light which warms your hand

Transmission: matters (glass, air) transmit light

Reflection/scattering: light bounce off matter (reflection when bouncing is all in same general direction) scattering (bouncing is more random)

4/A particle is a thing while a wave is a pattern revealed by its interactions with particles

Wavelength is the distance between two wave peaks

Frequency is the number of peaks passing by any point each second

Speed: tell us how fast their peaks travel across the pond

5/ Light waves are vibration of both electric and magnetic fields caused by the motions of charged particles. Thus, light is an electromagnetic wave

wavelength x frequency = speed of light = constant

Longer wavelength means lower frequency

Shorter wavelength means higher frequency

6/Light comes from individual pieces called photons (that have both properties of particles and waves). Like particles, it can be counted individually and can hit a wall one at a time. Like waves, it has wavelength and frequency

7/ Lowest to highest energy: radio, infrared, ultra violet, xrays, gamma rays

= same to lowest to highest frequency

=reverse order for wavelength

8/ Atoms consist of protons, neutrons, electrons.

Atoms are extremely tiny, The nucleus is nearly 100k times smaller than the atom but contains nearly all of its mass. Ten...