osvaldo science semester II

Weather vane: measures the direction

•  
• Wind sock: measures speed and direction of the wind. Used by ships and planes.
•  
• Anemometer:  main instrument used to measure the speed of the wind.

• Beaufort scale:  Admiral Francis Beaufort
• invented scale to measure the wind by looking at its effects on the environment.

1.   It is clean

2.    It’s renewable

3.    It’s not constant

1.   It’s clean

2.     It’s renewable

3.      It doesn’t produce toxic gasses.

4.      It promotes a reduction of fossil fuels

5.      It doesn’t impact on the environment

1.       It dangerous for birds and bats

2.       It isn’t constant

3.       It’s noisy

4.       It’s expensive $$$$$

5.       They make a visual impact on the environment

The energy of light humans percieve.

·   Radiometry

·   Photometry

·   It is the light wave’s measurement and detection in the electromagnetic spectrum

·    The human eye can only see a small portion of this

·     It measures the human perception of brightness.

·        Radiometry  is the entire electromagnetic spectrum

·     Photometry is the the light humans can see.

• 1.       Reflection: light changes direction
• when it collides with a body, for example a mirror

• 2.       Refraction: when light passes from one body to another refraction is produced, making objects look bigger or smaller,
• or other distortions.

The electromagnetic spectrum is all the wavelengths of light you can measure with RADIOMETRY. we can see just a small amount of this.

• energy you can hear.
• it travels in vibrating waves.

1 - pitch  :: (high or low)

2 - loudness :strength of the sound (loud or soft)

3 - timbre (type of sound - guitar vs violinfor example)

4 - frequency (the number of times a sound wave vibrates.)

4 - frequency