a. boundary b. normal c. incident rat d. reflected ray
2. regular reflection can happen from which of these surfaces?
a. plain mirror b. water c. sky d. cloud
3. we can see objects because of
a. reflection b. refraction c. transmission d. diffraction
4. according to the law of reflection,a light ray striking a mirror..
a. continues moving through the mirror in the same direction b. moves into the mirror at a slightly different angle c. bounces off the mirror toward the direction it came from d. bounces off the mirror at the same angle it hits.
5. the health effects due to increase in temperature appear during the exposure or immediately afrer it.
a. microwaves b. radio waves c. infrared d. visible light
