Question

11. Parallel beam containing light of 2. = 400 nm and 500 nm is incident on a prism as shown. T
0.8710
refractive index n of the prism is given by the relation no.)
= 1.20 +
2.2
А A
B В
С
Given sin 0 =0.8. Then which of the following statement is correct?
1) Light of 2. = 400 nm undergoes total internal reflection
2) Light of 2. = 500 nm undergoes total internal reflection
3) Neither of the two wavelengths undergo total internal reflection
4) Both the wavelengths undergo total internal reflection

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Answer 1

If by supplying a heat of Q to a substance of mass m, its temperature increases by Δt, then

Q∝

mΔt

or

Q=

cmΔt

where c= constant of proportionality , called specific heat capacity of the body.

Now, if

m=

1,Δt=

1 o

,

then,

Q=

c

therefore, specific heat is the heat required to raise the temperature of unit mass of substance by one degree Celsius.