Question

QUESTION 1

1. As the wavelength increases, the angle of deviation

   a.

   none

   b.

   decreases

   c.

   increases

   d.

   remains unchanged

1 points   

QUESTION 2

1. as the wavelength is increased. the index of refraction of the prism

   a.

   increases

   b.

   none

   c.

   decreases

   d.

   neither increases nor decreases

1 points   

QUESTION 3

1. The index of refraction depend son wavelength.

   True

   False

1 points   

QUESTION 4

1. The white light does not split into different colors.

   True

   False

1 points   

QUESTION 5

1. Which color has the most deviation?

   a.

   red

   b.

   purple

   c.

   orange

   d.

   none

1 points   

QUESTION 6

1. Which color has the least deviation?

   a.

   green

   b.

   blue

   c.

   red

   d.

   purple

1 points   

QUESTION 7

1. Why  does an  angle of the equilateral prism base measure 60 degrees?

   a.

   Sum of vthe three angles of a triangle measures less than 180 degrees

   b.

   Sum of the three angles of a triangle measures 180 degrees

   c.

   none

   d.

   Sum of the three angles of a triangle measures more than 180 degrees

1 points   

QUESTION 8

1. For air to water incidence at an angle of incidence of 30 degrees for a ray of light of wavelength  450 nm,

   a.

   angle of reflection is 30 degrees and angle of refraction is 30 degrees

   b.

   angle of reflection is 20 degrees and angle of refraction is 30 degrees

   c.

   angle of reflection is 20 degrees and angle of refraction is 20 degrees

   d.

   none

   e.

   angle of reflection is 30 degrees and angle of refraction is 20 degrees

1 points   

QUESTION 9

1. For air to glass incidence at an angle of incidence of 40 degrees for a ray of light of wavelength 550 nm,

   a.

   angle of reflection is  30 degrees, angle of refraction is 30 degree, and the refractive index is about 1.5

   b.

   angle of reflection is  40 degrees, angle of refraction is 25 degrees, and the refractive index is about 1.5

   c.

   angle of reflection is  40 degrees, angle of refraction is 30 degree, and the refractive index is about 1.5

   d.

   none

   e.

   angle of reflection is 40 degrees, angle of refraction is 40 degree, and the refractive index is about 1.0

1 points   

QUESTION 10

1. Which color is the most energetic  if energy varies inversely as the wavelength?

   a.

   green

   b.

   porple

   c.

   blue

   d.

   red

   e.

   orange

   f.

   none

1 points   

Answer 1

1) As the wavelength is increased , the refractive index of the medium would decrease and hence the angle of deviation would also decrease.

2) As the wavelength is increased , the refractive index of the prism decreases , as we know from the cauchy's formula that the wavelength and refractive index are inversely related to each other.

3) TRUE, the index of refraction depends on wavelength , and the relation is inversely proportional as given by the cauchyu's formula.

4) False, the white light light is composed of seven different colours that is violet , indigo , blue , green , yellow, orange, red, and thus the white light splits whenever it is passed through a prism because the different colours deviate by different amount on passing through the same material.

5) Orange has the most deviation as its wavelength is minimum out of the given options.

6) Red has the least devaition as its wavelength is maximum in the given available options.

10) Energy is inversely related to the wavelength, since blue has the minimum wavelength , therefore it is the most energetic.

Correct answer = c) BLUE

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