britann4256
25.08.2019 •
Physics
Most stars spend the majority of their lifetimes as which type of star?
a. giant
b. dwarf
c. protostar
d. main sequence user: a star's spectral class is related to which of these characteristics? select all that apply.
a. mass
b. radius
c. chemistry
d. temperature
e. distance to the center of its galaxy
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Ответ:
Whenever light(and waves in general) reach an obstacle, they bounce off. Shadows appear simply because, the light that was falling on that area or spot is being shielded.