Basic General Knowledge
When light passes from air into glass it experiences change of

frequency, wavelength and speed
frequency and wavelength
wavelength and speed
frequency and speed

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Basic General Knowledge
The five intertwined rings or circles on the Olympic Flag made of white silk are

from left to right yellow, red, green, black and blue respectively
from right to left blue, black, green, red and yellow respectively
from right to left blue, yellow, black, green and red respectively
from left to right blue, yellow, black, green and red respectively

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