Light and Sound .

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Light and Sound. In this unit: Properties of light Reflection Colours Refraction Properties of sound Hearing. Laser. Part 1 – Properties of Light. Light travels in straight lines:. Light travels VERY FAST – around 300,000 kilometres per second.
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Light and Sound In this unit: Properties of light Reflection Colors Refraction Properties of sound Hearing

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Laser Part 1 – Properties of Light goes in straight lines:

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Light ventures VERY FAST – around 300,000 kilometers for every second. At this speed it can circumvent the world 8 times in one moment.

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Thunder and lightning begin in the meantime, yet we will see the lightning first. Light voyages much quicker than sound. For instance: 2) When a beginning gun is shot we see the smoke first and after that hear the blast.

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We see things since they reflect light at us: Homework

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A glowing article is one that produces light. A non-glowing item is one that reflects light. Iridescent and non-glowing items Luminous articles Reflectors

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Rays of light Shadows are spots where light is "blocked": Shadows

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Properties of Light synopsis Light goes in straight lines Light ventures much speedier than sound We see things since they reflect light at us Shadows are framed when light is hindered by a question

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Part 2 - Reflection Normal Reflection from a mirror: Reflected beam Incident beam Angle of reflection Angle of occurrence Mirror

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Angle of rate = Angle of reflection The Law of Reflection as such, light gets reflected from a surface at ____ _____ point it hits it. The same !!!

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Clear versus Diffuse Reflection Smooth, gleaming surfaces have an unmistakable reflection: Rough, dull surfaces have a diffuse reflection. Diffuse reflection is when light is scattered in various headings

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Using mirrors Two illustrations: 2) An auto front light 1) A periscope

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Color White light is not a solitary shading; it is comprised of a blend of the seven shades of the r an i n b o w . We can exhibit this by part white light with a crystal: This is the way rainbows are shaped: daylight is "split up" by raindrops.

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The shades of the rainbow: Red Orange Yellow Green Blue Indigo Violet

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Adding hues White light can be part up to make isolate hues. These hues can be included once more. The essential shades of light are red, blue and green: Adding blue and red makes maroon (purple) Adding blue and green makes cyan (light blue) Adding red and green makes yellow Adding each of the three makes white once more

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Homework Seeing shading The shading a question shows up relies on upon the shades of light it reflects. For instance, a red book just reflects red light: White light Only red light is reflected

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A couple of purple pants would reflect purple light (and red and blue, as purple is comprised of red and blue): Purple light A white cap would mirror every one of the seven hues: White light

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Using shaded light If we take a gander at a hued question in hued light we see something else. For instance, consider a football unit: Shirt looks red White light Shorts look blue

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Red light Shirt looks red In changed shades of light this pack would look changed: Shorts look dark Shirt looks dark Blue light Shorts look blue

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Homework Some further cases:

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Red Filter Magenta Filter Using channels Filters can be utilized to "piece" out various shades of light:

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Investigating channels

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Red Blue Green White Yellow Cyan Magenta

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Refraction is when waves ____ __ or back off because of going in an alternate _________. A medium is something that waves will go through. At the point when a pen is set in water it would appear that this: For this situation the light beams are backed off by the water and are _____, bringing on the pen to look odd. The two mediums in this case are ______ and _______. Words – accelerate, water, air, twisted

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Sound – The nuts and bolts We hear things when they vibrate . On the off chance that something vibrates with a high recurrence (vibrates exceptionally ______) we say it has a _____ pitch. On the off chance that something vibrates with a low recurrence (vibrates ______) we say it has a ____ pitch. The most reduced recurrence I could hear was… Words – gradually, low, high, rapidly

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Drawing sounds… This sound wave has a _____ recurrence : This sound wave has a ___ _frequency :

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Drawing sounds… This sound wave has a _____ adequacy (noisy): This sound wave has a _____ sufficiency (calm):

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Hearing issues Our listening to range can be harmed by a few things: Too much ear wax! Harm to the sound-related nerve Illness or contaminations Old (dislike Mr Richards)

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Other sound impacts… Like light, stable can be… Reflected – sound reflections are called ______. Refracted – this is the reason you may sound abnormal in the event that you take a stab at talking submerged

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The Ear Label your outline with the accompanying: These bones are vibrated by the eardrum This tube conveys the sound towards the eardrum This part is utilized to help us keep our adjust This part "grabs" the vibrations This part of the ear contains numerous little hairs with transform vibrations into an electrical flag This part interfaces the ear to the mouth This part "channels" the sound towards the ear drum

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The Ear

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