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Refraction occurs at the boundary of two media when light travels from one medium into the other and its speed changes but its frequency remains the same. If the light ray hits the boundary at an angle which is not perpendicular to or parallel to the surface, then it will change direction and appear to `bend'.

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TRANSPARENT:
Translucent objects allow light,to pass through them partially.
-  Butter paper, ground glass, thin sheets of plastic
TRANSLUCENT:
Translucent objects allow light,to pass through them partially.
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OPAQUE
An opaque object is neither transparent (allowing all light to pass through) :
-Lampshades, frosted glass, wax paper, and notebook paper.

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-Its bent
- change of wavelengths and velocity
-Light traveling from one mediume to another

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Refraction | Geometrical Optics | Siyavula

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Siyavula's open Physical Sciences Grade 11 textbook, chapter 5 on Geometrical Optics covering Refraction

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-be enlarged, reduced, or the same size as object .
-can produce both real and virtual images
- they can be upright (if virtual) or inverted (if real)
- they can be behind the mirror (if virtual) or in front of the mirror (if real)

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located behind the convex mirror

a virtual image

an upright image

reduced in size (i.e., smaller than the object)

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- same distance

- same colour

-its virtual

- up right

- image reverse

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above at an angle at a straw in a glass of water. The straw appears bent in the liquid. This is because the light rays leaving the straw change direction when they hit the surface between the liquid and the air. Your eyes trace the light rays backwards as straight lines to the point they would have come from if they had not changed direction and as a result you see the tip of the straw as being shallower in the liquid than it really is.

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- Spoons
-blind spot mirrors
- dentist mirrors
- cosmetic mirrors

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- side mirror on a car,
-fisheye lenses,
- hallway safety mirrors
- Spoons

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-Looking at your self in the mirror

- Car mirrors

- Concave mirrors to zoom in for cosmetic reasons

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Applications of Reflection of Light in Daily Life - A Plus Topper

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Applications of Reflection of Light in Daily Life Meters like ammeters and voltmeters use a mirror to avoid parallax error. The reading is taken from a position such that the image of the pointer is directly under the pointer. The wing and rear-view mirrors of a car are made of a convex and a plane […]

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visible light wave lengths and frequency 

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visible light wave lengths and frequency 

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Light travels  at  different speed in different mediume

The wavelengths of the primary colour interfear with each other to toghether to show different colours

The eye contains nerves that identify 3 colours

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a wave in which the medium vibrates at right angles to the direction of its propagation.
Light and other types of electromagnetic radiation are transverse waves. Water waves and S waves (a type of seismic wave) are also transverse waves. In transverse waves, the vibrations are at right angles to the direction of travel.
- example:  vibrations in strings, ripples on water surface and electromagnetic waves

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Longitudinal waves are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave. ... Transverse mechanicalwaves are also called "shear waves".
example: Longitudinal waves include sound waves(vibrations in pressure, particle of displacement, and particle velocity propagated in an elastic medium)

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the displacement of spectral lines towards longer wavelengths (the red end of the spectrum) in radiation from distant galaxies and celestial objects. This is interpreted as a Doppler shift which is proportional to the velocity of recession and thus to distance.