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Train in the night

Tags: KB-point KB-point
Wednesday, February 9th 2005 / by Davide Troise

Sometimes a light wake reveals the motion of bodies.

Consequently to my astronomy studies, often I have to go by train to the home of a friend. What better opportunity to create an intentionally moved image?

Train in the night

Extimating a wake lenght of 2 meters, from an exposure of 1/8 seconds one can obtain a train instantly speed of 16 m/s equal to about 60 Km/h during the braking of train.

This entry was posted on Wednesday - February 9th, 2005 at 9:51 pm by Davide Troise and is filed under Light, Motion. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

One Response to “Train in the night”

  1. Boliboop :: Come trasformare la propria fotocamera digitale in un oscilloscopio Says:
    August 2nd, 2006 at 8:10 pm

    […] E’ risaputo che fotografare una sorgente luminosa, ad esempio una lampadina, in movimento genera una fotografia con una scia luminosa. Succede quando fotografiamo un lampione da un’auto in corsa o i fari di un treno in corsa dalla banchina di una stazione. Ma cosa è fisicamente questa scia? In pratica la sorgente luminosa viene ripresa in istanti successivi da differenti pixel della CCD della macchina fotografica, che corrispondono a diversi pixel della fotografia risultante. […]