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Refraction of light at plane surfaces
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(i) What is the value of the angle of deviation of the ray? (iii) Name an instrument where this action of the prism is used.
(i) 180 o (ii) This phenomenon of turning the light ray by 180 o is used in prism binoculars for 180 0 coverage range in vision.
Complete the ray diagram. What is the angle of deviation in it?
90 o
Yellow light is refracted through a prism producing minimum deviation. If i 1 and i 2 denote the angle of incidence and emergence for this prism, then (i) i 1 = i 2 (ii) i 1 > i 2 (iii) i 1 < i 2 (iv) i 1 + i 2 = 90 o
For minimum (or zero) deviation i1 = i 2
If the refractive index of water is 4/3 and that of glass is 3/2. What will be the refractive index of glass w.r.t. water?
µw = 4/3, and µg = 3/2 Refractive index of glass w.r.t. water ( wµg ) = aµg / aµw = 3/2 / 4/3 = 3/2 X 3/4 = 9/8
What can we conclude from the image given?
As the angle of incidence increases, first the angle of deviation decreases then for a certain angle of incidence, the angle of deviation becomes minimum and th
What are the factors affecting the refractive index of the medium?
Refractive Index of a medium depends upon the nature of the medium (optical density) ,wavelength of the light and temperature.
What happens to the focal length of convex lens when it is immersed in water??
Refractive index of the material of lens is greater than that of water.
What do you mean by absolute refractive index?
the ratio of the speed of light in a vacuum to the speed of light in the given medium. It is always greater than 1.
Which of the color shows maximum refractive index?
Violet color
The perpendicular distance between the incident ray and the emergent refracted ray is called as ____________.
Lateral displacement
Name the behavior shown by light in the given image?
Principle of reversibility
The ratio of speed of light in air to speed of light in any given medium is called as ___________.
Absolute refractive index.
What will be the unit of refractive index?
No unit.
If angle of incidence is zero, angle of refraction will be ________.
Zero
Refraction of light is the phenomenon which takes place due to the difference in the ___________ of the mediums.
Densities
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