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Day 13 IQWST Can I Believe My Eyes? Activity 4.1

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Dan Covey

on 21 September 2016

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Transcript of Day 13 IQWST Can I Believe My Eyes? Activity 4.1

Day 13 IQWST Can I Believe My Eyes?
Activity 4.1
Homework 4.1
Reading 4.1

Activity 4.1 How the Eye Works
Lesson 4 Pre-assessment

Please click on the link below and answer the question.

http://goo.gl/forms/zNoA99RfaF
Activity 4.1 How the Eye Works
Discuss the following as a group: Which of these objects is most like an eye? Type what your group thinks in question 1. These are our notes.
Activity 4.1 How the Eye Works
Let's take a selfie.

Try to take an image of your eye close up so that you can look at the details.
Does this change your opinion on what you think the eye is like?
Activity 4.1 How the Eye Works
Activity 4.1 How the Eye Works
Activity 4.1 How the Eye Works
The eye has a clear opening, called a pupil, that lets light through. The pupil is a covered opening-not a hole in the eye.
We are going to take a few notes on Activity 4.1 question 1
Activity 4.1 How the Eye Works
Sensors located in the back of the eye (the retina) sense light that reaches them and generate an electrical signal, which is sent to the brain through the
optic nerve.
Activity 4.1 How the Eye Works
So how does this fit in with the model to explain how light allows us to see? What would say to your parents now to add what happens in the eye?
Activity 4.1 How the Eye Works
So how does this help explain how a camera might work if a camera is like our eye?
Activity 4.1 How the Eye Works
We are going to be using light sensors. These allow us to measure light that comes only from the object that it is pointed at. Instead of sending a signal to the brain like an eye, it sends it to the computer to display a value called lux.

Knowing what you know about sight, how do you think the light sensor does what it does?
Activity 4.1 How the Eye Works
These sensors are sensitive pieces of equipment and are about $60 a piece.

They are a scientific tool and not a toy.
Activity 4.1 How the Eye Works
We are going to use the sensors to investigate light and patterns of brightness around the room.
What do you predict will be the brightest spots in the room?

What about the darkest spots?
Activity 4.1 How the Eye Works
Do question 3 in your lab manual. Draw the arrows to show the path the light takes so that it is measured by the sensor.
Activity 4.1 How the Eye Works
Trace the path of light to the sensor...
Activity 4.1 How the Eye Works
So let's collect the data now.
Complete The data table on #4 in your lab manual.
Activity 4.1 How the Eye Works
What patterns do you observe in terms of where the lux values were higher of lower?

What was the relationship between the light you sensed with your eyes and the reading of the sensor?

What was the relationship to the location of the sensor to the light source and the lux value?

How did the position of other objects affect the lux value?
Analyze the data:
Activity 4.1 How the Eye Works
What do you infer the reason is for the lux values being higher when the sensor was pointed at a light source?

What do you infer the reason is for the lux values being higher when you are closer to the source?

What do you infer the reason is for the lux values being lower when the sensor was pointed at a shadow?
Making sense of the data:
Activity 4.1 How the Eye Works
How is the way your eye senses brightness similar of different from the brightness readings taken by the sensor?

What do you see when you look in directions the sensor reads as bright? What do the higher numbers tell you about light?

What do you see when you look in directions the sensor reads as less bright?


Making sense of the data:
When you point the light sensor at an object, does it detect the object or the light from the object? How does this compare to how your eye works?

What would your eye or the sensor detect if there was no light bouncing off the object?
Activity 4.1 How the Eye Works
Making sense of the data:
What additions, changes, or deletions would you like to make to the list in our notes about the human eye based on what we have learned in this lesson?
Activity 4.1 How the Eye Works
Making sense of the data:
Activity 4.1 How the Eye Works
Complete the making sense question in Activity 4.1.
Making sense of the data:
Activity 4.1 How the Eye Works
Homework 4.1-Exploring Shadows

It needs to be completed before we do activity 5.2.
Activity 4.1 How the Eye Works
Reading 4.1- Eyes of the Animal Kingdom
Let's read and talk about
Reading 3.2 Faster than a speeding Bullet.
Skip to "What do we know about the speed of light today?"
Reading 3.2
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