How would you determine the refractive index of the rectangular slab?

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Fix a sheet of white paper on the drawing board with the help of drawing pins at the four corners of the sheet.

Place a glass slab at the center of the paper and mark its boundary EFGH with a fine pencil.

Remove the glass slab. Draw any line AB making an angle of 40 degrees with the normal at the point B, the middle point of EF approximately.

Put the glass slab back in position on the boundary line. Fix two pins P1 and P2 vertically on the line AB approximately 5 cm apart such that one pin is close to the slab.

Look for the image of these pins in the slab from the opposite side GH and fix two pins P3 and P4 so that they are in the line with the image of P1 and P2 as seen through the slab and approximately 5 cm apart.

Join the holes of P3 and P4 to obtain the emergent ray. Draw a normal to GH at the point C. join BC to get the refracted ray.

g) Measure the angle of incidence and angle of refraction. Produce AB forward and draw a perpendicular from C on AB produced to meet it at P. Then the lateral displacement = CP.

Now you can calculate the r.i of the glass slab from the Snell’s law considering n1 = r.i. of Air = 1, μ=Sini/Sinr μ=Sini/Sinr  

Repeat the experiment with different angles of incidence 50 and 60 degrees, if you want.

HOPE THIS HELPS

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ITZ RASPUTIN002

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this