Essay PreviewMore ↓
The aim of the project is to see which factors affect the size of a
shadow and then to look more closely at one of the factors to see how
exactly it varies the size of a shadow.
Variables that may affect the size of the shadow
Although, I will investigate how one factor affects the size of a
shadow, there are other factors that could be investigated. Here are
1) The distance between the light and the object
From the ray diagrams I can see that as the distance from the object
to the light source is doubled, the length of the shadow decreases. A
distance of 4cm produces a shadow of approximately 1.6-cm. Decreasing
the distance to 2cm(half the distance), the shadow size increases by
one and a half times to produce a shadow of 2.3 cm. The three ray
diagrams together show the increase of the distance between the object
and light source, decreasing the length of the shadow.
2) The distance between the object and the screen
The results from this are opposite varying the previous factor. In
this case the length of the shadow increased as the distance from the
edge of the object to the screen increased. I expected that as the
distance dubled, the length of the shadow would double but according
to the ray diagram that was not the case. The length of the shadow
The results from this are opposite to varying the previous factor. In
this case, the length of the shadow increased as the distance from the
edge of the object to the screen increased. I expected that as the
distance doubled, the length of the shadow would double but according
to the ray diagrams, that was not the case. The length of the shadow
increased by 1.6 times between changing the distance from 2 cm to 4 cm
(ie:doubling the distance).
How to Cite this Page
"Investigating How the Size of a Shadow Depends on the Angle at Which the Light Hits the Object." 123HelpMe.com. 28 Feb 2020
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- Investigating How Resistance Depends On Shape There are many factors involved in this experiment, which include the following: *The length of resistance putty *The width of resistance putty *The voltage running through the putty *The position of the variable resistor *The shape of the putty The factors, which I am going to investigate, are: *The resistance of the putty, when at different lengths I predict that the shorter I cut the putty, the lower the resistance will be.... [tags: Papers]
1002 words (2.9 pages)
- I really enjoyed this weeks science investigation about shadows and light. In my experience, this science work doesn’t look like the science courses I have taken in my K-14 education. Generally, my science courses were focused more on memorization rather than exploration. In my elementary science class, I remember memorizing science concepts, looking up words in the glossary, writing reports, and reading and answering questions from the book. Also, we had science magazines, where we had to read the articles and fill out the answers.... [tags: Experiment Reflection]
643 words (1.8 pages)
- The Shadow on the Stone by Hardy A man stands in front of a druid stone just as a reader stares at a brooding poem of love lost and fonder days remembered. “The Shadow on the Stone” gives insight into the psyche of Hardy after his first wife’s death, yet how does someone come to such a conclusion. Through the understanding of the strategic usage of several literary and poetic devices his audience is able to discern their pertinence to the comprehension of Hardy’s message. This poem is not necessarily difficult for the average reader to grasp, its value as a work of poetic prowess is found in the power of impression.... [tags: Shadow Stone Hardy Essays]
1077 words (3.1 pages)
- In the Shadow of Illness, the book describes different experiences of families who have or had children with cystic fibrosis (CF). CF is an inherited disease that is passed on from the mother or father who is a carrier, but doesn’t have the condition. Doctors have figured that in this scenario, the parents are likely to have a child with CF. Individuals with CF have to take Cotazymes to help the pancreas digest food. If the person does not take these enzymes, the food goes straight through them as diarrhea.... [tags: Family, Mother, Sibling, Doctor]
1387 words (4 pages)
- I felt myself being picked up from my cot. My eyes were swollen from the torrents of tears that I had cried. Strong muscular arms held me tight. I knew better than to feel safe, only harm came my way. I hiccuped into the person's chest. The way I was acting was not the way of a twenty year old, but of a toddler. The halls were long and narrow and bright lights only made them seem longer. Becoming bored with being held, I reached up to my head and much to my surprise I had hair. Searching the rest of my body I soon came to realize it must have been a dream.... [tags: Creative Writing Essays]
884 words (2.5 pages)
- Charlie-Horse In Shadow of a Doubt, Hitchcock utilizes and stretches the ambiguous line between comedy and suspense by utilizing smaller characters in the film to keep the story line moving, and to help break sequence or rhythm of what the audience had been perceiving at the time. Many of the minor characters were used as “fillers”, such as the waitress in the bar when Uncle Charlie and Charlie are sitting in the bar, and makes the comment “I would die for a ring like this”; or the quiet, gentle neighbor Herb who is fascinated with the process of homicide and murder.... [tags: essays research papers]
715 words (2 pages)
- Analysis of Smash Hits 'Smash Hits' sells itself as a 'popular music magazine’; it fits well into this self-proclaimed genre and creates its image through the codes, conventions, and generic signifiers of that genre. For example, bright, bold lettering-the red and white titles, almost like a stamp.... [tags: Papers]
2845 words (8.1 pages)
- h, p-leez, gimme a break, so what if I say wicked. Or evil is more appropriate. And stop those scrutinizing brows; this is of no inept revelation. And why begin it as eloquently as this is. Simple. Arrogance and hypocrisy within the breeze of air that surrounds me is as callous as they are overwhelmingly alluring and good-looking. Yes, I speak of a sheep in a wolf’s clothing, a metaphor you wish not to plummet into nor be one of its allies. Nor do I. Not in a million years. Beware, on land, on moon, on space, the wicked paranoia may never come as a visible being but in a tacit, truculent silence, like a shadow lurking behind your every step.... [tags: essays research papers]
727 words (2.1 pages)
- Investigating The Affect of Concentration on The Rate of Reaction Aim- To find out if changing the concentration of the hydrochloric acid affects the volume of gas released in 5 minutes. Background Information The rate of reaction depends on four things:- 1. Temperature 2. Concentration 3. Catalyst 4. Size of particles/surface area The Collision Theory The collision theory explains the rates of reaction, the rate of reaction depends on how often and how hard the reacting particles collide with each other.... [tags: GCSE Chemistry Coursework Investigation]
2090 words (6 pages)
- Investigating Plate Margins Plate margins are the edges of the plates, where all the power of nature is released in earthquakes and volcanoes. There are three main types of plate margins: - Spreading Boundaries There are two types of spreading boundary Ridges, where new rock is formed, pushing the plates apart, and Rift, where the plates pull apart, and the earth between them sinks. On the ocean floor the plates are spreading. All along the mid ocean ridge, volcanic activity is pouring new lava out onto the seabed.... [tags: Papers]
1104 words (3.2 pages)
increased the length of the shadow, which was expected, but I was
surprised as it increased by more than I had expected. When the
distance was 2cm the length of the shadow was 1.1 cm. By tripling the
distance to 6cm,if I then tripled the length of shadow it would come
to 3.3cm.This was shown in the 3rd ray-diagram as 3.3cm
3) The light source
'If the point source of light is replaced by a spread-out or extended
source such as a table lamp, the edge of the shadow becomes fuzzy and
indistinct. Around the area of full shadow, there is a region of part
shadow where only some of the light from the lamp has been stopped'
(Quoted from 'Explaining Physics' from Stephen Pople')
4) The shape of the object
For this I would keep the area the same but change the shape in order
to keep the same object size. I will use a rectangle and a square.
From these diagrams I can clearly see that there is an effect. The
rectangle has a shadow just under two and a half times larger than the
squared shape's shadow. The vertical height of the rectangle is 2cm
and is 1cm for the square. I think this could be a reason for the
shadow length being bigger for the rectangle.
5) The angle at which the screen is
This shows that by increasing the angle the screen is held at,
increases the length of the shadow. As I have not measured the angles
I cannot compare the increase of angle to the length of shadow in
numerical form, but this could be further investigated.
6) The size of the object
This is an obvious effect but it still is a factor as it affects the
size of the shadow in a directly proportional way i.e.: the bigger the
object, the larger the size of shadow.
7) The angle at which light hits the object
This shows by increasing or decreasing the angle the length of the
shadow increases. By increasing the angle to 20º the length of shadow
changes from 1.9cm to 2.6 i.e.: it increases by 1.3 times.
I have decided to investigate how varying the angle at which light
hits the object affects the size of a shadow. It is important that all
the other factors are kept constant in all my experiments; otherwise I
would not be finding the effect of the factors, but of a mixture of
factors. Therefore these factors will be kept constant.
· The distance between the light and the object: I will keep this
constant by moving the light in a semi-circle, where the distance
between the light and the object will stay the same.
· The distance between the object and screen: The screen and the
object will not be moved throughout all the experiments.
· The light source
· The shape of the object: The same object will be used each time.
· The angle at which the screen is: The screen will be clamped 90º to
the ground and will not he altered.
· The size of the object: The same object will be used each time.
I predict that when the object is hit with light travelling 0º to the
object (as shown below),a shadow will form, which will be smaller than
the shadow formed by light hitting the object at another angle. As the
angles get further away from the 0, the size of the shadow will
increase. I think this due to the ray diagram drawn below.
I also think that as the angle triples the size of the shadow will
From information from the four ray diagrams I can draw up this very
simple table which gives approximate values.
Length of shadow (cm)
Decreasing the angle has an inverse effect on the length of the
shadow. The difference between the length of shadow in angle 0º and
15º is only 0.2cm.Therfore in 15º the length increases by 0.2cm, but
then the differences get bigger. Between 30º and 45º the difference is
The reason for doing this was to find out what apparatus was suitable,
how things would be best arranged, how results would be taken etc.
I clamped a screen upright using a clamp stand. I selected a couple of
different objects, which were different from each other to try them
all out, and see which one I liked. I brought 12V torch bulb and a
1.5V torch bulb to try. I set up the experiment as shown below: The
object between the screen and the light.
From this I realised that
* A 12V torch bulb would suit me better as the bright light created
a darker shadow than the 5V bulb, which was very dim. A darker
shadow was more vivid than the fainter shadow, therefore easier to
take measurements from.
* Moving the object and changing it with other objects made me
realise that a 2D shade didn't stay upright very well. I decided
not to opt for the scissors because as it was difficult to measure
the size of the shadow.In the end I chose a 3D rectangular block.
* Standing the block upright was a better than leaving it lying on
its wider base as it was hard to see the edges of the shadow, when
it was lying flat.
* A large screen
* A 12V torch bulb and a power supply
* A rectangular block
* A sheet with a large protractor drawn on it indicating the angles
I will place the light at
I need to change the angle by 15º each time i.e.: 15º further away
from the starting line each time. I will measure the length and width
of the shadow in order to work out the areas. The ruler will be marked
with cm's and mm's. I will measure to the nearest .