0
What is the minimum index of refraction for a glass or plastic prism to be used in binoculars so that total internal reflection occurs at 45 degrees?
Wiki User
∙ 8y ago
The minimum index of refraction for a glass or plastic prism to be used in binoculars so that total internal reflection occurs at 45 degrees is 1.414
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
When light is incident on a surface at 30 degrees it is found that reflected ray and refracted ray are perpendicular to each other Find angle of refraction How?
The angle of incidence equals the angle of reflection.
What experiments can you do to show reflection and refraction?
Simply looking at a mirror requires reflection and refraction. By looking at a mirror, light reflects off of you and on to the mirror and back at you, and the light will refract throught the convex lenses in your eyes for you to see your reflected image. You can also look through a microscope, because microscopes are filled with lenses and a few mirrors. You can also put a stick in a glass of water to show refraction. Put the stick in at about 45 degrees, and the stick will look like it is broken in half, due to refraction. If you look at the the stick from under the cup at a corner, you can only see the part of the stick that's under the water, and if it's still in a 45-degree angle, it will have a relflection right on the water's surface, and both the stick and its reflection will form an angle of about 90 degrees. This is a way to prove the law of reflection.
How is reflection of light from a plane mirror different from the refraction of light as it enters a piece of glass?
Light scattering by paper and reflection by a mirror are not all that different. Light scattering by a paper reflects light in many different directions because of its rough surface. Reflection by a flat mirror is reflection by a smooth surface at an angle 180 degrees from the incident angle.
What is the angle of incidence if the angle of reflection is 15 degrees?
If the ray is incident at right angles to the reflection surface, angle of Incidence will be 90 degrees and so will be the angle of reflection. In such a case, the incident ray, the normal and the reflected ray coincide.
State the relationship between the amount of bending and the index of refraction as light passes from an optically less dense medium to an optically denser one?
The amount of bending that a light ray experiences can be expressed in terms of the angle of refraction (more accurately, by the difference between the angle of refraction and the angle of incidence). A ray of light may approach the boundary at an angle of incidence of 45-degrees and bend towards the normal. If the medium into which it enters causes a small amount of refraction, then the angle of refraction might be a value of about 42-degrees. On the other hand if the medium into which the light enters causes a large amount of refraction, the angle of refraction might be 22-degrees. (These values are merely arbitrarily chosen values to illustrate a point.) The diagram below depicts a ray of light approaching three different boundaries at an angle of incidence of 45-degrees. The refractive medium is different in each case, causing different amounts of refraction.
What happens when the angle of refraction is 90 degrees or greater?
I think total internal reflection
What happens if the refraction angle is greater than ninety degrees?
This means no refraction occurs i.e. Total internal reflection (all light reflected) occurs
What a prism does?
A prism can help us understand the refraction and the reflection of light when it asses between 2 different mediums ( from one medium into another less refractive or from one medium into another more refractive ) and the ray of light may emerge out of the prism by refraction or by reflection and sometimes by total internal reflection ( by obeying the 2 laws of reflection and by making the angel of incidence equal to the angle of reflection ) and sometimes it may continue its path without deviation that is when the angle of incidence is equal to 0 degrees then the angle of refraction will be equal to 0 degrees this is called undeviated !It separates the wavelengths contained in a beam of light.
What does prism?
A prism can help us understand the refraction and the reflection of light when it asses between 2 different mediums ( from one medium into another less refractive or from one medium into another more refractive ) and the ray of light may emerge out of the prism by refraction or by reflection and sometimes by total internal reflection ( by obeying the 2 laws of reflection and by making the angel of incidence equal to the angle of reflection ) and sometimes it may continue its path without deviation that is when the angle of incidence is equal to 0 degrees then the angle of refraction will be equal to 0 degrees this is called undeviated !It separates the wavelengths contained in a beam of light.
What does prism do?
A prism can help us understand the refraction and the reflection of light when it asses between 2 different mediums ( from one medium into another less refractive or from one medium into another more refractive ) and the ray of light may emerge out of the prism by refraction or by reflection and sometimes by total internal reflection ( by obeying the 2 laws of reflection and by making the angel of incidence equal to the angle of reflection ) and sometimes it may continue its path without deviation that is when the angle of incidence is equal to 0 degrees then the angle of refraction will be equal to 0 degrees this is called undeviated !It separates the wavelengths contained in a beam of light.
When light is traveling along the normal will its direction change?
This is total internal reflection where the angle of refraction is 90 degrees and its incident angle would be the critical angle(angle of incident for which the angle of refraction is 90).... This hapens when the angle of incidence is in a medium more dense than the angle of refraction's medium
Is the rainbow example of total internal reflection?
No. In fact, "total" internal reflection of sunlight is impossible inside a spherical raindrop.Rainbows are caused by the combined effects of refraction and (not "total") internal reflection, which concentrates the light near deflection angles of 40 to 42 degrees. Since each color is concentrated at a slightly different angle, we see arcs of color at the angles where each color is most intense.Snell's Law of Refraction says that the angle between the light and the surface normal is greater in the thinner medium (air) than the denser one (water). "Total" internal reflection occurs when light tries to exit the denser medium, but can't because the angle it would have to exit at is greater than 90 degrees. But this can't happen in a spherical water droplet, because the interior angle is always the same every time it hits, or reflects from, the surface.
What is angle of incident if the ray is 45 degrees?
It depends on whether the process is reflection or refraction. You have chosen not to share that critical bit of information!
What does a prism do with white light?
A prism can help us understand the refraction and the reflection of light when it asses between 2 different mediums ( from one medium into another less refractive or from one medium into another more refractive ) and the ray of light may emerge out of the prism by refraction or by reflection and sometimes by total internal reflection ( by obeying the 2 laws of reflection and by making the angel of incidence equal to the angle of reflection ) and sometimes it may continue its path without deviation that is when the angle of incidence is equal to 0 degrees then the angle of refraction will be equal to 0 degrees this is called undeviated !It separates the wavelengths contained in a beam of light.
What is internal reflection?
Total internal reflection can happen only when a beam of light travelling through a dense medium crosses the interface with a rarer medium. For example, through a glass piece to air. When such a beam reaches an interface it makes an angle (called the angle of incidence) with the perpendicular at that point. When the beam exits the interface into the rarer medium. it makes a larger angle(called the angle of refraction) with the same perpendicular. As the angle of incidence increases, so does the angle of refraction. There is one value of the angle of incidence for which the angle of refraction is 90 degrees and the emerging ray is tangential to the interface. This is called the critical angle. For all angles of incidence greater than the critical angle the incident ray will not emerge into the rarer medium at all. In stead it gets reflected back into the denser medium itself. This phenomenon is called total internal reflection. Rainbows are a result of this phenomenon.
What is total internal reflection?
Total internal reflection can happen only when a beam of light travelling through a dense medium crosses the interface with a rarer medium. For example, through a glass piece to air. When such a beam reaches an interface it makes an angle (called the angle of incidence) with the perpendicular at that point. When the beam exits the interface into the rarer medium. it makes a larger angle(called the angle of refraction) with the same perpendicular. As the angle of incidence increases, so does the angle of refraction. There is one value of the angle of incidence for which the angle of refraction is 90 degrees and the emerging ray is tangential to the interface. This is called the critical angle. For all angles of incidence greater than the critical angle the incident ray will not emerge into the rarer medium at all. In stead it gets reflected back into the denser medium itself. This phenomenon is called total internal reflection. Rainbows are a result of this phenomenon.
What occors when light changes speed as it passes from one medium to another?
If the light is at an angle to the medium, then refraction (change of direction) and possibly reflection. If light travels at 90 degrees than maybe only slight reflection.
