(4x4=16)
2. Each Question carries FOUR marks.
11. Refractive indices of material media are given below.
Material medium Refractice index Mass density (gm/cc)
Water
1.33
1
Kerosene
1.44
0.8
Crown glass
1.52
2.59
Canada Balsam
1.53
0.99
Answer the following questions basing on the above table.
a) "The velocity of the light is lesser in kerosene than water. Do you support
the statement? Why?
b) Why should we use canadabalsam to glued lenses ?
2
neriodic tableic state the group number and period number
Answers
Answer:
a) yes due to more refractive index in kerosene than water
b) to paste glass of same refractive index
Answer:
Explanation:
The cause of refraction is a change in light speed; and wherever the light speed changes most, the refraction is greatest. The speed is related to the optical density of a material that is related to the index of refraction of a material. Air is the least dense material (lowest index of refraction value) and water is the denser material (largest index of refraction value). Thus, it would be reasonable that the most refraction occurs for the transmission of light across an air-water boundary.
Refractive index is the the ratio of the velocity of light in a vacuum to its velocity in a specified medium.
Here, the refractive index will be more for a more denser medium as the speed of light through a denser medium will be lesser.Hence, the speed of light is maximum in the B