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.

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 July 22, 2014 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 July 22, 2014).

Share This




More Matter & Energy News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Government Approves East Coast Oil Exploration

Government Approves East Coast Oil Exploration

AP (July 18, 2014) The Obama administration approved the use of sonic cannons to discover deposits under the ocean floor by shooting sound waves 100 times louder than a jet engine through waters shared by endangered whales and turtles. (July 18) Video provided by AP
Powered by NewsLook.com
Sunken German U-Boat Clearly Visible For First Time

Sunken German U-Boat Clearly Visible For First Time

Newsy (July 18, 2014) The wreckage of the German submarine U-166 has become clearly visible for the first time since it was discovered in 2001. Video provided by Newsy
Powered by NewsLook.com
Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Reuters - US Online Video (July 17, 2014) President Barak Obama stopped by at a lunch counter in Delaware before making remarks about boosting the nation's infrastructure. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

TheStreet (July 16, 2014) Oil Futures are bouncing back after tumbling below $100 a barrel for the first time since May yesterday. Jeff Grossman is the president of BRG Brokerage and trades at the NYMEX. Grossman tells TheStreet the Middle East is always a concern for oil traders. Oil prices were pushed down in recent weeks on Libya increasing its production. Supply disruptions in Iraq fading also contributed to prices falling. News from China's economic front showing a growth for the second quarter also calmed fears on its slowdown. Jeff Grossman talks to TheStreet's Susannah Lee on this and more on the Energy Department's Energy Information Administration (EIA) report. Video provided by TheStreet
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:
from the past week

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