summary sheet for grade 11 summer exam.pdf waves and sounds

8/12/2019 Summary Sheet for Grade 11 Summer Exam.pdf Waves and Sounds

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7. Mirror and lens formula(real is positive sign convention) 1/f = 1/v + 1/u where f= focal length, v = image distance, u

= object distance

8. Magnificationmeans how many times bigger the image is than the object. A magnification of 2 means that the image

is 2 times the size of the object. A magnification of 0.5 means that the image is 0.5 times the size of the object.

*Magnification = image distance/ object distance *Magnification = image height / object height

9.Power of lens= 1/ (focal length in meters) Thicker a lens, shorter the focal length

10.Refractive index (n) equations *n= sin I / sin r *n= real depth/ apparent depth

*n= speed of light in air / speed of light in medium *n=1/sin C therefore C = (1/n) sin-1 C=critical angle

11. Critical angle (C) is an angle of incidence for which the angle of refraction =900(or refracted ray lies along the

boundary) Total internal reflectionoccurs when the angle of incidence is greater than the critical angle.

12. Laws of refraction: *Snells law of refraction: the ratio of sin I to sin r is a constant for a given pair of media.

*The normal ray, incident ray and the refracted rays are all in the same plane.

Eye(pg24)

1.compare the camera and eye, parts, function,Short sightedness- light rays meet in front of the retina, correction: use concave, diverging lens.

Long sightedness- light rays meet behind the retina, correction: use convex, converging lens.

Colour(pg 27)

1.Dispersionof white light into its components (ROYGBIV)by prism,

2.Recombinationof spectrum by prisms.

*Primary: red, blue, green *Secondary: magenta, cyan, yellow *Complimentary: [magenta,

green], [cyan, red], [yellow, blue]

Colours of the spectrum and relationship to wavelength and part of the electromagnetic

spectrum eg. Violet is closest to UV while Red is closest to IR.


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Electromagnetic spectrum(pg 50)

1.complete spectrum in order of wavelengths or frequencies; gamma, x-rays, UV, infrared, , radio waves, (microwaves).

2.Properties of electromagnetic waves, learn at least 4: all electromagnetic waves*transfer energy from one place to

another * can be emitted and absorbed by matter *do not need a medium to travel through * travel at 3.0 x 108m/s in a

vacuum * are transverse waves and can be polarized * can be superposed and produce interference effects

(constructive and destructive interference) *obey the laws of reflection and refraction * can be diffracted * carry no

charge

3.Uses and propertiesof individual electromagnetic waves

summary sheet for grade 11 summer exam.pdf waves and sounds

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