Question

I.Write the meaning: 1. chopped - 2. Thumped - 5. Expensive- 6. Cracks 3. Astronaut - 4. Harvest -​

Answer 1

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1. cut (something) into pieces with repeated sharp blows of an axe or knife.
2. to hit somebody/something hard with something, usually your closed hand (fist)
3. costing a lot of money...

Answer 2

Answer:

A plane mirror is a mirror with a flat reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. The angle of the incidence is the angle between the incident ray and the surface normal.