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Related Concept Videos

Simple Harmonic Motion and Uniform Circular Motion01:42

Simple Harmonic Motion and Uniform Circular Motion

While simple harmonic motion and uniform circular motion may be two separate concepts, they correlate and interlink with each other. Simple harmonic motion is an oscillatory motion in a system where the net force can be described by Hooke's law, while uniform circular motion is the motion of an object in a circular path at constant speed.
There is an easy way to produce simple harmonic motion by using uniform circular motion. For instance, consider a ball attached to a uniformly rotating...
Uniform Circular Motion01:14

Uniform Circular Motion

Uniform circular motion is a specific type of motion in which an object travels in a circle with a constant speed. For example, any point on a propeller spinning at a constant rate is undergoing uniform circular motion. The second, minute, and hour hands of a watch also undergo uniform circular motion. It is hard to believe that points on these rotating objects are actually accelerating, even though the rotation rate is constant. To understand this, we must analyze the motion in terms of...
Non-uniform Circular Motion01:22

Non-uniform Circular Motion

In uniform circular motion, the particle executing circular motion has a constant speed, and the circle is at a fixed radius. However, not all circular motion occurs at a constant speed. A particle can travel in a circle and speed up or slow down, showing an acceleration in the direction of motion. In that case, the motion is called non-uniform circular motion, and an additional acceleration is introduced, which is in the direction tangential to the circle. 
For example, such accelerations...
Planar Rigid-Body Motion01:22

Planar Rigid-Body Motion

Understanding the movement of a rigid body in planar motion involves recognizing that every particle within this body is traversing a path that maintains a consistent distance from a specific plane. This concept is fundamental in the study of physics and mechanical engineering, and it allows us to comprehend better how objects move in space.
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the drone...

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Related Experiment Video

Updated: Jun 16, 2026

Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
09:04

Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

Published on: January 14, 2020

Pulse holography of uniformly moving objects.

S Mallick

    Applied Optics
    |February 6, 2010
    PubMed
    Summary

    Holography with moving objects can be improved by adjusting the reference beam frequency to counteract Doppler shifts, thus enhancing image clarity.

    Area of Science:

    • Optics and Photonics
    • Holographic Imaging
    • Laser Physics

    Background:

    • Holography typically assumes stationary objects for accurate image reconstruction.
    • Object motion during holographic recording introduces significant image degradation.
    • Pulse lasers are used, but motion effects remain a challenge.

    Purpose of the Study:

    • To theoretically analyze the impact of uniform object motion on holographic image irradiance using pulse lasers.
    • To quantify the factors causing image attenuation in moving object holography.
    • To propose a method for mitigating motion-induced irradiance loss.

    Main Methods:

    • Theoretical analysis of holography for a uniformly moving object.
    • Calculation of irradiance in the reconstructed holographic image.

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    Last Updated: Jun 16, 2026

    Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
    09:04

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    Published on: January 14, 2020

    Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects
    10:16

    Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

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  • Investigation of image attenuation due to path difference and Doppler effect.

    • Main Results:

    • Image irradiance is attenuated by both finite path difference and object motion.
    • Object motion causes a more severe attenuation, calculable via path difference or Doppler frequency shift.
    • The Doppler effect's impact on irradiance is directly related to object velocity.

    Conclusions:

    • Object motion significantly reduces reconstructed holographic image irradiance.
    • Compensating for the Doppler shift by adjusting the reference beam frequency can cancel motion effects.
    • This frequency-matching technique offers a method to improve holographic imaging of moving objects.