Waves

Question 1

Refracation

Answer 1

Refraction is the bending of light when it slows down and hits another medium.

Question 2

Speed of sound

Answer 2

The speed of sound is around 340 m/s in gas, 1500 m/s in liquid and around 5000 m/s in a solid.

Question 3

Vacuum

Answer 3

A vacuum is a machine that sucks all of the gas particles out of a container to make the thing inside it silent.

Question 4

Cornea

Answer 4

The cornea is a part of the eye that refracts light as it enters the eye through the pupil.

Question 5

Lens

Answer 5

The lensrefracts entering light to focus it onto the retina where the light needs to meet.

Question 6

Retina

Answer 6

The retina is a part of the eye that contains light receptors which trigger electrical impulses to be sent to the brain when light is detected.

Question 7

Convex lens

Answer 7

A convex lens refracts the light to meet at the retina. People need a convex lens if the light meets behind the retina. This person is long sighted

Question 8

Concave lens

Answer 8

A concave lens diverges the refracted light to make it meet at the retina. People need a concave lens if the light meets before the retina. This person is short sighted

Question 9

Peak

Answer 9

The peak or crest is the top of a sound wave

Question 10

Reflected ray

Answer 10

A reflected ray is a ray that shines on an object but then shines of the object and somewhere else

Question 11

Frequency

Answer 11

Frequency is how many waves are displayed per second

Question 12

Amplitude

Answer 12

Amplitude is the measurement from the crest to the middle

Question 13

Transverse waves

Answer 13

The oscillations are at right angles to the direction of travel and energy transfer

Question 14

Ultrasound

Answer 14

Ultrasound sends frequencies greater than 20000Hz. It sends waves into the body and it reflects of and object and gets displayed onto a screen. Doctors use this during pregnancy

Question 15

Echo

Answer 15

An echo is the reflection of sound bouncing off of a solid and coming back to you.

Question 16

Wave

Answer 16

A wave is a vibration through air particles to make sound so that it can be heard.

Question 17

Pitch

Answer 17

The pitch of a sound is how hight or how low the sound is.

Question 18

Reverberation

Answer 18

Reverberation is the return or bounce back of an echo.

Question 19

Incident ray

Answer 19

The incident ray is the light that is shining on the surface/ the light that hits it first.

Question 20

Wave length

Answer 20

The distance until the waves shape repeats its shape.

Question 21

Dispersion

Answer 21

The separating of light when they split into different colours.

Question 22

Speed of light

Answer 22

The speed of light as it travels through air and space is much faster than that of sound; it travels at 300 million meters per second or 273,400 miles per hour.

Question 23

Spectrum

Answer 23

The band of colours produced by separation of light by their different degrees of refraction.

Question 24

Longitudinal wave

Answer 24

A kind of wave that vibrates in the direction of propagation.

Question 25

Law of reflection

Answer 25

The law of reflection states that the incident ray and the normal to the surface of the mirror all lie in the same plane.

Question 26

Medium

Answer 26

A substance that makes it possible to hear waves by providing particles for vibration.

Question 27

Angle of refraction

Answer 27

The amount of appeared bending there is when the light is refracted.

Question 28

Diffuse scattering

Answer 28

It is the scattering that arises from any departure of the material structure from that of a perfectly regular lattice.

Question 29

Specular reflection

Answer 29

It is the mirror like reflection of light from a surface.