1.How does the light travels?
a.Light travels in a straight path only.
b.Light travels as wave only.
c.Light travels as wave and straight path only
d.Light does not travel
2.What would you to see someone behind you without having to turn?
a.use a mirror
b.use a projector
c.use a baramoter
d.use of telescope
3.Which of the following materials can be used to protect ourselves from excessive heat and light?
a.hat
b.headband
c.cellphone
d.shoes