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   the reflection of the light ray may be 30 degrese

Explanation:

if the light ray is in between 70 and 20 but is closer to 20 its maybe 30

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

radiation

explanation:

heat is transmitted by radiation