Featured Research

from universities, journals, and other organizations

Hall effect at the speed of light: How can you demonstrate relativistic effects with your mobile phone?

Date:
May 21, 2012
Source:
RIKEN
Summary:
The relativistic Hall effect describing objects rotating at speeds comparable with the speed of light has now been reported.

The rolling-shutter effect is a visual distortion and vertical shift of the centroid of a rotating propeller caused by the time delay from the horizontally-moving shutter of the camera.
Credit: Image courtesy of RIKEN

The relativistic Hall effect describing objects rotating at speeds comparable with the speed of light has now been reported.

Related Articles


The work by Konstantin Bliokh and Franco Nori at RIKEN in Japan, NAS in Ukraine, and the University of Michigan in the US sheds light on aspects of fundamental physics, and you can demonstrate some aspects of this with your mobile phone.

As any cameraman knows, recording a fast rotating object such as a fan using a "rolling shutter" camera, like those found on mobile phones, results in weird distortions.

See for example, http://www.youtube.com/watch?v=17PSgsRlO9Q, http://www.youtube.com/watch?v=LVwmtwZLG88&feature=fvwrel.

Less widely understood -- until now -- is the link between these distortions and some of the landmark theories in physics, namely Einstein's relativity and the Hall effect.

Hall effects describe the interplay of rotation and linear motion in objects. There are already a number of manifestations of the Hall effect, including classical, quantum, and 'spin-based'.

Relativity describes effects that arise when an object approaches the speed of light. This study considered the Hall effect as arising naturally under special relativity conditions without any external fields. The researchers found that a relativistic treatment of rotating bodies and quantum wave systems with angular momentum results in deformations and a shift in the geometric centre. The distortions have parallels with those found when recording a rotating object with a rolling shutter camera.

"Our description makes relativistic and quantum aspects of angular momentum fully consistent with each other," conclude Bliokh and Nori.

This relativistic approach may find applications over a wide range of length scales including elementary spinning particles, classical light and, even rotating black holes.


Story Source:

The above story is based on materials provided by RIKEN. Note: Materials may be edited for content and length.


Journal Reference:

  1. Konstantin Bliokh, Franco Nori. Relativistic Hall Effect. Physical Review Letters, 2012; 108 (12) DOI: 10.1103/PhysRevLett.108.120403

Cite This Page:

RIKEN. "Hall effect at the speed of light: How can you demonstrate relativistic effects with your mobile phone?." ScienceDaily. ScienceDaily, 21 May 2012. <www.sciencedaily.com/releases/2012/05/120521102950.htm>.
RIKEN. (2012, May 21). Hall effect at the speed of light: How can you demonstrate relativistic effects with your mobile phone?. ScienceDaily. Retrieved January 31, 2015 from www.sciencedaily.com/releases/2012/05/120521102950.htm
RIKEN. "Hall effect at the speed of light: How can you demonstrate relativistic effects with your mobile phone?." ScienceDaily. www.sciencedaily.com/releases/2012/05/120521102950.htm (accessed January 31, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Saturday, January 31, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Nanoscale Sensor Could Help Wine Producers and Clinical Scientists

Nanoscale Sensor Could Help Wine Producers and Clinical Scientists

Reuters - Innovations Video Online (Jan. 30, 2015) — A nanosensor that mimics the oral effects and sensations of drinking wine has been developed by Danish and Portuguese researchers. Jim Drury saw it in operation. Video provided by Reuters
Powered by NewsLook.com
Tesla 'Insane Mode' Gives Unsuspecting Passengers the Ride of Their Life

Tesla 'Insane Mode' Gives Unsuspecting Passengers the Ride of Their Life

RightThisMinute (Jan. 29, 2015) — If your car has an "Insane Mode" then you know it&apos;s fast. Well, these unsuspecting passengers were in for one insane ride when they hit the button. Tesla cars are awesome. Video provided by RightThisMinute
Powered by NewsLook.com
Now Bill Gates Is 'Concerned' About Artificial Intelligence

Now Bill Gates Is 'Concerned' About Artificial Intelligence

Newsy (Jan. 29, 2015) — Bill Gates joins the list of tech moguls scared of super-intelligent machines. He says more people should be concerned, but why? Video provided by Newsy
Powered by NewsLook.com
Senate Passes Bill for Keystone XL Pipeline

Senate Passes Bill for Keystone XL Pipeline

AP (Jan. 29, 2015) — The Republican-controlled Senate has passed a bipartisan bill approving construction of the Keystone XL oil pipeline. (Jan. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins