When red light in a vacuum is incident at the Brewster angle on a certain type of glass, the angle of refraction is 29.9 ∘. What are (a) the Brewster angle and ( b) the index of refraction of the glass? In Figure 26.17 light strikes the surface of a liquid at the Brewster angle, and the reflected light is 100 % polarized.
Therefore, Ibn Al-Haytham already discovered and predicted phenomena related to refraction several hundred years before modern physics emerged. The explanation for refraction is based on the scientific fact that light travels at different speeds in different media. 1.
explain that refraction happens whenever light passes from one medium to another. The teacher can summarise the activities by asking the students to describe the three phenomena they encountered in the activity (bending, and focussing of light).
When the angle of incidence for the light striking the same 20.3 ∘, the angle of refraction for the light entering the slab is the same as when the slab was in a vacuum. What is the index of refraction of the liquid? A stone held just beneath the surface of a swimming pool is released and sinks to the bottom at a constant speed of 0.48 m / s.
Refraction is a test for visual acuity, perform ed using a:
Suspensory ligaments that hold the lens in place (attached to the capsule and ciliary body)
Using this, he was able to explain why the sky changes color at twilight (the Sun’s rays hit the atmosphere at an angle, causing refraction (where one medium is the vacuum of space, and the other is the atmosphere). From this, he was able to accurately estimate the depth of the Earth’s atmosphere, 1000 years before it would be proven by spaceflight! He wrote “Visual objects seen by us through light refraction – across thick material such as water and glass – are bigger than their real size”. Therefore, Ibn Al-Haytham already discovered and predicted phenomena related to refraction several hundred years before modern physics emerged. The explanation for refraction is based on the scientific fact that light travels at different speeds in different media.
explain that refraction happens whenever light passes from one medium to another.
When light goes through a magnifying glass the light bends toward the center. The spot where the light converges is called the focal point, but beyond the focal point the image appears to reverse because the light rays that were bent pass each other and the light that was on the right side is now on the left and the left on the right, which makes the arrow appear to be reversed.
Explanation: We see that when the bowl is empty, the edge of the bowl stops you from seeing the coin. When the bowl is filled with water, the light bends over the edge, so you can see the coin. We notice this too in everyday life, when things at the bottom of a pool or river always look closer to the surface than they really are. This is because of the way light is bent when traveling from air to the water. This is an effect of refracted light! In fact, you have just demonstrated a physics concept called refraction, the bending of light.
Using this, he was able to explain why the sky changes color at twilight (the Sun’s rays hit the atmosphere at an angle, causing refraction ( where one medium is the vacuum of space, and the other is the atmosphere). From this, he was able to accurately estimate the depth of the Earth’s atmosphere, 1000 years before it would be proven by spaceflight! He wrote…
Before going through the activity, read the story attached: 5.3 The physicist Ibn Al-Haytham develops a theory of light
This is because transparent materials like water have a different density than the air it is traveling in, causing the light to change velocity and direction inside of it – therefore making the pencil look bent!
In an ultra-low-temperature experiment, a collection of sodium atoms enter a special state called a Bose-Einstein condensate in which the index of refraction is 1.57 × 10 7 . What is the speed of light in this condensate?
Light is reflected from a glass coffee table. When the angle of incidence is 56.7 ∘ , the reflected light is completely polarized parallel to the surface of the glass. What is the index of refraction of the glass?
A slide projector has a converging lens whose focal length is 105.00 mm. (a) How far (in meters) from the lens must the screen be located if a slide is placed 108.00 mm from the lens? (b) If the slide measures 24.0 m m × 36.0 m m what are the dimensions (in mm) of its image?
Violet light and red light travel through air and strike a block of plastic at the same angle of incidence. The angle of refraction is 30.400 ∘ for the violet light and 31.200 ∘ for the red light. The index of refraction for violet light in plastic is greater than that for red light by 0.0400 . Delaying any rounding off of calculations until the very end, find the index of refraction for violet light in plastic.
The refractive indices of materials A and B have a ratio of n A / n B = 1.33 . The speed of light in material A is 1.25 × 10 8 m / s . What is the speed of light in material B?
Light in a vacuum is incident on a transparent glass slab. The angle of incidence is 35.0 ∘. The slab is then immersed in a pool of liquid. When the angle of incidence for the light striking the same 20.3 ∘, the angle of refraction for the light entering the slab is the same as when the slab was in a vacuum. What is the index of refraction of the liquid?
Amber ( n = 1.546) is a transparent brown-yellow fossil resin. An insect, trapped and preserved within the amber, appears to be 2.5 c m beneath the surface when viewed directly from above. How far below the surface is the insect actually located?