Physics
Physics
Physics
Physics
Physics
100
How will the image appear on a convex mirror if the object is placed between the focal point and the mirror?
Smaller and right side up
100
What is the main function of the retina?
To receive light that the lens has focused, convert the light into signals, and send these signals onto the brain for visual recognition.
100
When Blue and Red are mixed what colour is created?
Magenta
100
What happens to the wavelengths as the frequency increases?
The wavelengths decrease.
100
What do you call a window that is neither opaque nor transparent?
Translucent
200
Why is a leaf green?
Because the chlorophyll in the leaf reflects green and absorbs the rest of the colours in the spectrum.
200
What is the eye's outermost protective layer?
The cornea
200
When a light ray is shined at a plane mirror the angle of refraction is the same as_____?
The angle of incidence.
200
Nearsightedness is also known as?
Myopia
200
What is the largest source of light we have?
The sun
300
What is a reflection?
A change in direction of a wavefront at an interface between two different media.
300
What are the three Primary colours?
Red,Blue,Green
300
How is light used in colour printers?
Light reflects off the page onto a light sensitive drum that makes ink particles stick to the drum which is then transferred to the paper.
300
How is UV light harmful?
UV rays can damage the eyes as more than 99% of UV radiation is absorbed by the front of the eyes and can cause Corneal damage etc.
300
How do incandescent bulbs produce light?
An electric current passes through the filament, heating it to a temperature that produces light.
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