Does adding Sodium Chloride (NaCl) to Water affect the refractive angle of light?
The Index of refraction of a transparent object is a measure of its ability to alter the direction of a ray of light entering it. When light is passed through water it slows down, therefore when light slows down it changes direction and this is called refraction. Testing will be on finding how the angle of refraction changes in water as the amount of salt (NaCl) is increased.
When the amount of Sodium Chloride (NaCl) is changed in a solution with water how will it affect the angle of refraction of a ray of light?
Hypothesis:
I think that the angle of refraction will increase as the amount of salt is increased as the liquid becomes denser and the light will slow down and refract even more. As is shown in the salt solution refractive index table by topac, the refractive index (How much the light bends) is increased very slightly each time. So I think that the angle of refraction will increase but at a very slight rate possibly 1 degree or less as I will be using minimal salt changes. (Add more words)
Variable
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Variable What is The Variable How it will be used
Independent Variable Amount of Salt (NaCl) The amount of salt will change by 1g each time to a maximum of 5g
Dependent Variable Angle of Refraction It will be measured by drawing on the line of incidence and line of refraction and measuring the angle of refraction
Controlled Variable Same Angle of Incidence I will draw the angle of incidence 5 times and it will be exactly in the same place on every paper Same Light I will use the same light box and power source to keep the experiment controlled Same Medium Instead of changing water each time I will increase and dissolve an extra gram of salt each time
Equipment and Materials Required:
Scale
Measuring Cylinder
Ray
1.Mass out desired amount of baking soda. Each subsequent trial will use one gram more.
Mix 50ml of WATER with 15ml (1 tbsp) of SALT in one beaker or cup
help give a better idea of how the rate of osmosis is affected by the
As the light is increased so would the rate of photosynthesis. Apparatus: boiling tube, 250ml beaker, bench lamp, ruler, sodium
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Then, repeat steps 7-11 another 4 times but with the room temperature water. For the room temperature water just leave it in the room but try not to change the room’s temperature. 15. Try to put all your recorded data into a table for organization 16. Repeat the entire experiment for more reliable data.
Diagram:.. Variables:.. I am making variables in only one field. I am changing only the concentration of the salt solution.
paper that has a black cross drawn on it. I will then measure 15cm³ of
be the height of the ramp which in turn would affect the angle of the
of distilled water. For the 1M solution I added 50 cm3 of HCl and 50
Refraction of Light Aim: To find a relationship between the angles of incidence and the angles of refraction by obtaining a set of readings for the angles of incidence and refraction as a light ray passes from air into perspex. Introduction: Refraction is the bending of a wave when it enters a medium where it's speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media. The amount of bending depends on the indices of refraction of the two media and is described quantitatively by Snell's Law. (Refer to diagram below)
The Effect of Salt Solution Concentration On The Mass Of Potatoes Introduction = == == == ==
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