GENSCI L7 Q1

light

form of energy that helps people to see objects 3 × 10^9 travels very fast that it can move through empty space vacuum

light travels in straight lines

or called ray

reflection of light

is the bouncing back of a light ray when it hits a smooth or polished surface

absorption of light

occurs when a matter captures electromagnetic radiation and converts its energy to another form

refraction of light

the bending of a light ray when it passes at an angle from transparent material to another

sound

is form of energy produced by vibration they cannot travel through empty space it needs medium such as air water or solids

solid

it travels fast in sound

vibration

guitar strings human vocals

sound waves

through materials by vibrating particles

pitch

how high or low (whistle sing and drum)

loudness

strength or volume sound(sirens or whispers) still depends on amplitude

echo and reflection of sound

bounce back after hutting surfaces. (Sonar system navigation underwater snd detecting distances)

echolocation

uses ultrasound waves and reflection waves helps in knowing objects location in place

sound proofing

reduces and unwanted noises

sound amplifiers

to adjust volumes

led

energy efficient light sources or light emitting diode)

hologram

3d imaged provided using light

lasers

theyre focus and powerful