A - opposite
I have to write 20 characters so....jghghgyf
Explanation:
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Answer:

Explanation:
= Actual wavelength = 
= Relative permittivity = 1.44
The observed wavelength in the glass is given by

The wavelength lies in the range of green light.
Hence, the observed color of light is 
Hello, Ayalaarianna6otpduy!
I believe your answer is Speed!
Glad I Could Help, And Good Luck!
~AnonymousGiantsFan~