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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

To determine the divergence of Given Laser Beam

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How is the divergence angle of a laser beam measured practically?

a: Using a ruler to measure the diameter of the laser at different distances Explanation

Explanation

b: Using a Michelson interferometer Explanation

Explanation

c: By calculating the change in intensity with distance Explanation

Explanation

d: Measuring the beam diameter at two points and calculating the angle Explanation

Explanation

What property of a laser changes as it diverges?

a: Wavelength Explanation

Explanation

b: Intensity profile Explanation

Explanation

c: Coherence length Explanation

Explanation

d: Speed of light Explanation

Explanation

Which mathematical relationship is used to calculate the divergence angle (θ) in a laser experiment?

a: θ = λ / d Explanation

Explanation

b: θ ≈ (D1 - D2) / L, where D1 and D2 are diameters at two points and L is the distance between them Explanation

Explanation

c: θ = c / λ Explanation

Explanation

d: θ = I1 / I2 Explanation

Explanation

What effect does the divergence of a laser beam have on its application in long-distance measurements?

a: Improves precision Explanation

Explanation

b: Reduces beam coherence Explanation

Explanation

c: Reduces intensity at long distances Explanation

Explanation

d: Increases beam polarization Explanation

Explanation

Which of the following can minimize the divergence of a laser beam?

a: Using a longer wavelength Explanation

Explanation

b: Passing the beam through a concave lens Explanation

Explanation

c: Using collimating optics Explanation

Explanation

d: Increasing the laser cavity length Explanation

Explanation

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