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A shadow is a dark area where light from a light source is blocked by an opaque object. ... The length of a shadow cast on the ground is proportional to the cotangent of the sun's elevation angl...

## SCSA Shadow Length Calculator - Walter Sanford

planetcalc.com/1875/

This simple online calculator gives a vertical object shadow length for specified day and geographic coordinate. The calculator uses Sun position algorithm to ...

## Solving Proportions: More Examples - Purplemath

www.purplemath.com/modules/ratio7.htm

A very common class of exercises is finding the height of something very tall by using the daytime shadow length of that same thing, its shadow being down ...

Jan 24, 2013 ... Suns effect on length of shadows ... Telling the time with Shadows! ... A Must watch hand shadow show- Mile sur mera tumhara- Ugram ...

## Light and shadows: Shadow-tracing - The Earth and Sun - Learn NC

www.learnnc.org/lp/editions/earth-sun/6568

In this lesson, students will go outdoors at three different times during the school day to measure the lengths of their shadows. After recording how their shadows ...

## Solving Triangles - Math Images - Math Forum

mathforum.org/mathimages/index.php/Solving_Triangles

May 29, 2012 ... The length from the tip of the shadow to the point on the surface where the object stands can be viewed as the first leg, or base, of the triangle, ...

## a 5 foot vertical pole casts a 3 foot shadow a tree casts a 20 foot ...

This is a proportion problem. We will use the ratio of object height to shadow length. For the pole, the ratio is 5 ft:3 ft. Since the height of the tree is unknown, we ...

## The shadow rule: a simple method for sun protection. - NCBI

www.ncbi.nlm.nih.gov/pubmed/9671831

The shadow rule indirectly determines the sun's altitude by observing the length of a person's shadow during the time course of a day. When the shadow on a ...

## Phil Plait's Bad Astronomy: SPOILER Review: The Mummy Returns

diagram of shadow length To the right you can see a diagram of how a shadow is cast by an object. The length of the shadow depends on the height of an object ...

### SunCalc - sunrise, sunset, shadow length, sun position, sun phase ...

www.suncalc.org

Online application to ascertain the sun movement with interactive map, sunrise, sunset, shadow length, sun position, sun phase, sun height, sun calculator, ...

### Daytime Shadows | National Schools' Observatory

www.schoolsobservatory.org.uk

Shadows are created when an object, such as the stick below, blocks out some of the Sun's light. The length of the resulting shadow depends on how low or ...