How do you determine the resolving power of your eye?

We may perform a simple experiment to determine the resolving power of eye. We will make a pattern of black stripes of equal width separated by white stripes as shown in the figure below. All the black stripes should be of equal width, while the width of white stripes should increase from left to right. We have to paste the pattern at the height of our eye. By moving away or closer to the wall, we will find the position where we can see some two black stripes as separate stripes. ALL the black stripes which are left to it would merge into one another and on the right they would be more clearly visible. Note the width of the white stripe d that separates the two regions and measure the distance D of the eye from the wall. Then d D is the resolving power of our eye.

E M B I B E

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Wave Optics>Exercise>Q 69

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IMPORTANT

Earn 100

Find the final intensity of light $(I^{''}),$ if the angle between the axes of two polaroids is $60^{o}$ .

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Important Questions on Wave Optics

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12th Uttar Pradesh Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Wave Optics>Exercise>Q 70

Unpolarized light of intensity

I

passes through an ideal polariser

A

. Another identical polariser

B

is placed behind

A

. The intensity of light beyond B is found to be

\frac{I}{2}

. Now another identical polariser

C

is placed between

A

and

B

. The intensity beyond B is now found to be

\frac{I}{8}

. The angle between polariser

A

and

C

is

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Wave Optics>Exercise>Q 71

If unpolarised light is incident on a crystal at

60^{o}

so that the reflected light is completely polarized, then refractive index of the crystal should be

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Wave Optics>Exercise>Q 72

A decimeter length of solution with concentration

500 k g / m^{3}

rotates the plane of polarization by

24^{o}

. Specific rotation of the solution is

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Wave Optics>Exercise>Q 73

Write down mathematical form of Malus law?

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Wave Optics>Exercise>Q 74

Explain the construction of polaroid.

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Wave Optics>Exercise>Q 75

Two polaroids are placed in position so that intensity of emergent light is maximum. If one of the polaroid is rotated by

30 °, 90 °

relative to other than under new position the intensity of emergent light is how much part of maximum intensity?

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Wave Optics>Exercise>Q 76

When sun is at

37 °

with horizon, then reflected light from surface of water is totally polarised. Find out refractive index of water.

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Wave Optics>Exercise>Q 77

The polarising directions of two polariser plates are parallel hence the intensity of emergent light is maximum. What is the minimum rotation of one of the plates so that intensity of emergent light remains one fourth of maximum intensity?