We began class with reviewing what we did last Thursday and Friday while Mr. Banow was away.
Thursday we learned and applied an equation showing the relationship between the image and the object. With the equation we could calculate magnification, find the height of the object and image, and find the distance of the object and the image.
hi/ho = di/do
h= height
d=distance
i=image
o=object
We then got a Pinhole Question worksheet and worked on that for the remainder of the period.
Friday we did the Pinhole Camera Investigation lab in small groups. The purpose of this lab was to investigate the properties of a pinhole camera and experiment with magnification of images. We used a pinhole camera and a lit candle to see the flame (image) in the pinhole camera. We discovered that in fact the image was inverted. As the distance between the pinhole camera and the object was greater, the image in the pinhole camera appeared smaller.
Today in class we began a new topic on plane mirrors. In small groups we did an activity to discover where the image location for an object was in front of a plane mirror. We placed a plane mirror in the middle of a piece of paper and then put a nail 5 cm in front of the centre of the mirror. We marked down that the nail represented the object. Then moving to the left with one eye open, we lined up another nail 5 cm away from the mirror in line with the original nail we saw in the mirror and marked it down as 1. We then repeated this step except instead we placed and marked down the nail 8 cm away from the mirror. After this we repeated the process on the right side labelling the two spots with a 2. Then we drew a line through the two labelled points and extended it beyond the mirror labelling them lines 1 and 2. Where the two lines intersected beyond the mirror was the image location. Then we drew lines from where Line 1 and 2 intersected with the mirror to the object. After that we drew perpendicular lines from where Line and 2 intersected with the mirror and measured the angles.
Although our group didn't achieve accurate results, the image on the opposite side of the mirror line was supposed reflected the same as the object. This activity was the beginning of our understanding on plane mirrors. The person in charge of the next blog will be Mackenzie :D
Thursday we learned and applied an equation showing the relationship between the image and the object. With the equation we could calculate magnification, find the height of the object and image, and find the distance of the object and the image.
hi/ho = di/do
h= height
d=distance
i=image
o=object
We then got a Pinhole Question worksheet and worked on that for the remainder of the period.
Friday we did the Pinhole Camera Investigation lab in small groups. The purpose of this lab was to investigate the properties of a pinhole camera and experiment with magnification of images. We used a pinhole camera and a lit candle to see the flame (image) in the pinhole camera. We discovered that in fact the image was inverted. As the distance between the pinhole camera and the object was greater, the image in the pinhole camera appeared smaller.
Today in class we began a new topic on plane mirrors. In small groups we did an activity to discover where the image location for an object was in front of a plane mirror. We placed a plane mirror in the middle of a piece of paper and then put a nail 5 cm in front of the centre of the mirror. We marked down that the nail represented the object. Then moving to the left with one eye open, we lined up another nail 5 cm away from the mirror in line with the original nail we saw in the mirror and marked it down as 1. We then repeated this step except instead we placed and marked down the nail 8 cm away from the mirror. After this we repeated the process on the right side labelling the two spots with a 2. Then we drew a line through the two labelled points and extended it beyond the mirror labelling them lines 1 and 2. Where the two lines intersected beyond the mirror was the image location. Then we drew lines from where Line 1 and 2 intersected with the mirror to the object. After that we drew perpendicular lines from where Line and 2 intersected with the mirror and measured the angles.
Although our group didn't achieve accurate results, the image on the opposite side of the mirror line was supposed reflected the same as the object. This activity was the beginning of our understanding on plane mirrors. The person in charge of the next blog will be Mackenzie :D
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