Transverse Waves without a medium. They travel in electrical and magnetic fields
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Electromagnetic Spectrum
name for the range of electromagnetic waves when placed in order of frequency and wavelength.
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Radio Waves
lowest frequency and longest wavelength
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Gamma Rays
highest frequency and the shortest wavelength
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Visible Lights
the only EM Waves that we can see
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Cosmic Rays
another high-energy radiation from energetic cosmic events in space. These rays are produced by stars such as the sun. One of the examples of Cosmic Rays are aurora borealis or the northern lights.
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X-Rays
are wavelengths with 10 nm to 0.01m, these rays have enough energy to penetrate deep into tissues and can cause damage to cells
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Rays
light waves that travels in straight lines
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Reflection
is the change in direction of a wave front at an interface between two different media so that the wave front returns into the medium from which it originated
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Refraction
is the change in direction of wave propagation due to a change in its transmission medium
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Dispersion
a phenomenon in which the phase velocity of a wave depends on its frequency
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Diffraction
is the spreading of light after it passes around the edge of an object
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Absorption
the light wave could be absorbed by the object, in which case its energy is converted to heat (THERMAL ENERGY).
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Human Eye
produces a real, inverted image in the retina.
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Camera
forms a real and inverted image on a photographic film
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Compound Microscope
forms a real, inverted, and enlarged image near the focus of the eyepiece
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eyepiece of A Telescope
works as magnifier, therefore Telescopes produces enlarged images
Studied by 16 people
