We like some of the sounds we hear in our surrounding. They are called…………….
a) Slow wind
b) Unpleasant sound
c) Music
d) Pleasant sound
Noisy environment is due to …………….
a) Slow wind
b) Unpleasant sound
c) Music
d) Pleasant sound
Sound cannot travel through … PST ---P-1----18L
a) Liquids
b) Vacuum
c) Sounds
d) gases
How does light travel in air?
a) in a circle
b) along curved path
c) along a straight line
d) in dispersed path
Which object does reflect maximum light?
a) white paper
b) colored paper
c) mirror
d) brick wall
Speed of sound is maximum in………
a) a metal wire
b) air
c) water
d) vacuum
