Is it possible to restructured an upright object from its shadow only,

  • Context: High School 
  • Thread starter Thread starter rajeshmarndi
  • Start date Start date
  • Tags Tags
    Shadow
Click For Summary

Discussion Overview

The discussion explores the possibility of reconstructing an upright object solely from its shadow, considering various shapes such as cubes and other models. The conversation touches on the implications of light sources and transparency in relation to shadow formation.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions whether it is possible to reconstruct an upright object from its shadow, specifically mentioning a cube or similar models.
  • Another participant asks if it is possible to differentiate between the shadows of a disk and a sphere.
  • A participant asserts that reconstruction is not feasible if the light source is not directly above the object, noting that hidden vertices will not be visible in the shadow.
  • There is a consideration of how a transparent object, like a glass cube, might allow for edge visibility in its shadow, particularly when the light source is at an angle.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of reconstructing objects from shadows, with some arguing against it due to limitations of light source positioning and visibility of hidden features.

Contextual Notes

The discussion does not resolve the assumptions regarding the nature of light sources, object transparency, or the specific conditions under which shadows are cast.

rajeshmarndi
Messages
319
Reaction score
0
is it possible to restructured an upright object from its shadow only, for example an cube or any model?
 
Physics news on Phys.org


Can you tell the difference between the shadow of a disk and that of a sphere?
 


No.
If the light source is not on top of the model, the shadow will be different.
But i understand any vertices that is hidden between the object and the shadow will not be revealed.
 


if the object is an transparent like an glass cube where we can see its edges on its shadow?
and again if the light source is not from top and from different angle.
 

Similar threads

High School Thought Experiment: Behavior of shadow of object moving at speed c
  • · Replies 14 ·
Replies
14
Views
2K
High School Can a Planet Have a Moon that Never Casts a Shadow?
  • · Replies 19 ·
Replies
19
Views
3K
Undergrad Uncertainty in an experiment with an image viewed through a big slit
  • · Replies 3 ·
Replies
3
Views
1K
High School How will light react in this situation....
  • · Replies 7 ·
Replies
7
Views
2K
High School Star like object travels in a zigzagging pattern relative to other stars
  • · Replies 49 ·
2
Replies
49
Views
12K
High School Huh? Seeing crisp vitreous floaters while using microscope
  • · Replies 7 ·
Replies
7
Views
3K
High School Is our 3D universe a shadow of a 4D Universe?
  • · Replies 9 ·
Replies
9
Views
4K
Undergrad Project sharp shadows from LED
  • · Replies 1 ·
Replies
1
Views
3K
High School Reason for black gel pen refills leaking in winter
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Optics question: I need parallel illumination for a Contact Image Sensor (CIS)
  • · Replies 16 ·
Replies
16
Views
2K