Fourier Transform In Diffraction Grating

1. The given mathematical representation belongs to: y(t) = x(t-T)

• Time multiplication

• Time shifting

• Time scaling

• Time reversal

2. Fourier transform of x*(t)

• X*(ω)

• X*(jω)

• X*(-jω)

• X*(-ω)

3. The tendency where a beam of light or other wave systems are scattered and bent when passing through a object is called as …………

• Diffraction

• Spectrum

• Total internal reflection

• Reflection

4. How many properties in fourier transform and which properties given are true?

• 11 - Modulation, Duality

• 13 - Complex, linearity

• 12 - Symmetry, Time

• 11 - Transform, Parseval’s Theorem

5. Which of the following is the Analysis equation of Fourier Transform?

• 
• 
• 
• 

6. What is Huygens’ Principle?

• Transform the signals between two different domains, such as transforming signal from frequency domain to time domain or vice versa.

• If there is an infinite distance between the source and the screen from the obstacles, the wavefront becomes a plane.

• Light does not always travel in a straight line. It tends to bend around objects.

• Every point along a wave-front emits a spherical wave that interferes with all others.

7. In diffraction, when a laser illuminates a rough surface or passes through a region where it can scatter a little bit, the result is in the ………. pattern.

• Spherical

• Plane

• Speckle

• Blurred

8. What is the idea between the following figure?

• Both diffraction light wave is from a source at finite distance.

• Huygens diffraction emits a spherical wavefront while Fraunhofer diffraction emits a plane wavefront.

• Huygens diffraction patterns on spherical surfaces while Fraunhofer diffraction patterns on flat surfaces.

• Both diffraction are not required lenses to observe.