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How is the refractive index of one medium with respect to the otherrelated to the speed of light?
The refractive index of any substance is(speed of light in vacuum)/(speed of light in that substance) .The number is greater than ' 1 ' in any material medium.
What is the ratio of the speed of light in a vacuum to the speed of light in a different medium?
This is called the index of refraction. When light crosses the boundary between mediums (media) with different indices, it is bent (refracted).It's usually defined the other way around ... the ratio of the speed of light in vacuum to its speed in the medium. Since the speed of light is greater in vacuum than in any medium, the number is always greater than 1. It's referred to as the "refractive index" of the medium.
What will happen to a light ray incident on a glass-to-air boumdary at greater than the critical angle?
Anything greater than critical angle will cause the light to just be reflected.
Is the angle of incidence greater than the angle of refraction?
In general, the angle of incidence is greater than the angle of refraction when light passes from a denser medium to a less dense medium, such as from water to air. This is described by Snell's Law, which states that the ratio of the sines of the angles is proportional to the ratio of the velocities of light in the two media. However, when light travels from a less dense medium to a denser one, the angle of incidence can be less than or equal to the angle of refraction.
In E equals mc2 what does mc2 equal?
E represents energy, m represents mass, and c² is a very large number, the square of the speed of light.
When comparing a beam of red light and a beam of green light which beam contains the greater number of photons?
Neither. The beams of red light and green light will have the same number of Photons, as energy is only related to frequency. The number of Photons is dependent on the intensity of the light beams.
Which photons have greater energy those associated with microwaves or those asociated with visible light?
Photons associated with visible light have greater energy than those associated with microwaves. Visible light photons have higher frequencies and shorter wavelengths, while microwave photons have lower frequencies and longer wavelengths. The energy of a photon is directly proportional to its frequency, so higher frequency photons carry more energy.
Is the speed of darkness greater than the speed of light?
Darkness is only the absence of light. The 'speed of darkness', or the speed at which darkness 'propagates' (even though only the absence of photons is propagating) is therefor equal to the speed of light.
How many photons are there in a beam of light?
More than 1. Describing the intensity of the beam will establish the number of photons per second striek a perpendicular surface of a given area.
Light intensity is?
Light is composed of quanta called photons. The more photons, the greater the intensity. To see the slightest flicker of green light (the color to which our eyes are most sensitive), the minimum number of photons is six.
How is intensity of light related to photons?
The intensity of light is directly related to the number of photons present. Higher intensity light has more photons, while lower intensity light has fewer photons. Each photon detected carries a discrete amount of energy that contributes to the overall intensity of the light.
Which statement best describes the light that will cause emission of electrons from a given metal through the photoelectric effect?
The light must consist of photons with energy equal to or greater than the work function of the metal to cause the emission of electrons through the photoelectric effect. The intensity of the light does not play a significant role in the emission of electrons, only the energy of individual photons matters.
What do light sensors do?
Light sensors measure the number of photons or the energy of light hitting the sensor.
Is there more photons in brighter light?
Yes, brighter light typically means more photons are present because brighter light has a higher intensity, which is measured by the number of photons hitting a given area over time. So, in a brighter light source, there are indeed more photons emitted.
What is energy of blue light waves compared to red light?
Blue light waves have higher energy compared to red light waves because blue light has a shorter wavelength. This means that blue light photons have greater energy levels than red light photons.
What do light sensors measures?
Light sensors measure the number of photons or the energy of light hitting the sensor.
How does amplitude affect how we see light?
Amplitude affects the brightness of light, with greater amplitudes producing brighter light. When the amplitude of light changes, the number of photons reaching the retina changes, influencing how we perceive the intensity of the light. Our perception of light intensity is directly related to the amplitude of light waves.
