We can see visible light with our eyes because: the presence of the cornea that
ID: 3308274 • Letter: W
Question
We can see visible light with our eyes because:
the presence of the cornea that stops the light as it reaches the eye
the presence of the retina that covers the front two-thirds of the eye
the presence of the retina that covers the back two-thirds of the eye
None of the above
Interference and Diffraction are the best arguments that prove the wave character of light.
True
False
Longitudinal waves as well as Transversal waves may show Polarization effects.
True
False
Electromagnetic Waves were predicted by:
James Clerk Maxwell
Isaac Newton
Michael Faraday
None of the above
Every point of a wavefront may be considered the source of secondary wavelets spreading out in all directions. This Law is called:
Faraday's Principle
Huygens' Principle
Planck's Principle
None of the above
Electromagnetic Waves involve a very wide range of different frequencies that we call the Electromagnetic Spectrum.
True
False
Diffraction is the bending of light waves as it passes the edge of an object.
True
False
Electromagnetic Waves are Transversal waves. This means that the Electric and Magnetic fields in the wave are perpendicular to the propagation direction.
True
False
A material is opaque when it strongly absorbs the Electromagnetic Waves in a given spectral range of frequencies.
True
False
Glass is opaque to infrared waves because the entire atoms are set to vibrate at the same frequency.
True
False
the presence of the cornea that stops the light as it reaches the eye
the presence of the retina that covers the front two-thirds of the eye
the presence of the retina that covers the back two-thirds of the eye
None of the above
Explanation / Answer
1. We can see visible light with our eyes because of the presence of the retina that covers the back two-thirds of the eye. The retina is also lined up with the light sensing cells known as rods and cones.
2. True. because light interferes and difracts in the same way as a wave.
3. False. because if we place a polarizer in front of a longitudinal wave and rotate it, then we'll not observe any change in intensity of light.
4. Electromagnetic waves were predicted by James clerk Maxwell.
5. Every point of a wavefront may be considered the source of secondary wavelets spreading out in all directions. This Law is called: Huygens' Principle.
6. True.
7. True. It also refers that light also covers some region in the geometrical shadow region.
8. True. The electric field, magnetic field and the direction of propagation all are mutually perpendicular to each other.
9. True.
10. True. As for glass being opaque for infrared waves the glass molecules interacts with the incoming photons, absorbing them and turning the energy to heat, or also reflecting them from the surface in a disorganized fashion.
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