Semester 1 exam

Question 1

Speed of light

Answer 1

299 792 458 m / s

Question 2

Light

Answer 2

A type of electromagnetic radiation that is visible to the human eye.

Question 3

Electromagnetic spectrum

Answer 3

Range of wavelengths or frequencies over which electromagnetic radiation extends.

Question 4

Propogatation

Answer 4

Refers to the spreading or moving through when a medium or vacuum.

Question 5

Medium

Answer 5

A material or substance that allows the transfer of a form of energy from a substance to another substance.

Question 6

Wave length

Answer 6

Distance between two peaks of the wave, symbolised by the greek letter, lambda (up side down y)

Question 7

The seven different categories of the electromagnetic spectrum, based on frequencies

Answer 7

Mnemonic:

R - Radio waves
I - Infrared waves
G - Gamma rays
M - Microwaves
U - Ultraviolet waves
X - X-ray waves
V - Visible light

Question 8

Frequency

Answer 8

Refers to the number of cycles or oscillations of a wave in a given period of time, measured in Hertz (Hz), representing number of cycles per second.

Question 9

What does frequency affect?

Answer 9

Frequencies affect the speed, amount of energy, and resonance or it’s ability to apply force and cause vibration.

Question 10

What is the universal wave equation?

Answer 10

Speed (v) = frequency (f) times wavelength (lambda). This is like the distance formula.

Question 11

Reflection

Answer 11

Process by which light, sound or other waves bounce off a surface and change direction.

Question 12

Plane mirror

Answer 12

Flat, smooth mirror with a reflective surface that reflects light in a linear line. It is virtual, meaning an exact image cannot be captured by a photograph and also, it is also laterally inverted, meaning it is in a opposite position

Question 13

Spherical mirror

Answer 13

Mirror with a curved reflective surface that is part of a sphere. Two types include concave or convex.

Question 14

Concave mirror

Answer 14

Reflective surface that curves like the inside of a bowl. This mirror creates concepts such as focal point and length.

Question 15

Focal point

Answer 15

The converged or meeting point after light rays are refracted or reflected.

Question 16

Focal length

Answer 16

Distance between the mirror and the focal point.

Question 17

Convex mirror

Answer 17

A diverging mirror (seperating and going outwards), which causes light rays to spread out or propagate l upon reflection, making objects appear smaller and further away than they actually are because of the wideness of their view.

Question 18

Mechanical wave

Answer 18

A wave that is an oscillation of matter, and therefore transfers energy through a medium.

Question 19

Oscillation

Answer 19

Regular variation in magnitude or position about a central point.

Question 20

What the Newtonian laws?

Answer 20

Newton’s 1st law of motion: Law of Inertia
Newton’s 2nd Law of Motion: Law of acceleration
Newton’s 3rd Law of Motion: Law of action and reaction.

Question 21

Law of Inertia

Answer 21

states that an object at rest will remain at rest, and an object in motion will continue in that motion unless acted upon by an external force.

Question 21

Law of acceleration

Answer 21

States that the acceleration of an object is directly proportional to the force applied, and inversely proportional to the mass.

Question 22

Law of action and reaction

Answer 22

law states that if a body exerts an equal force on an object, the second object will exert an equal force in the opposite direction.

Question 23

Field

Answer 23

a physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time.

Question 24

Reflection

Answer 24

the throwing light, heat, or sound without absorbing it.

Question 25

Refraction

Answer 25

the bending of light as it passes through one medium to another.

Question 26

Dispersion

Answer 26

spreading of white light into its full spectrum of wavelengths.

Question 27

Magnification formula

Answer 27

M = Hi/Ho = u/v

Question 28

Characteristics you need to analyse when describing an image

Answer 28

1. Where is it located? 2. Is it inverted? 3. Size relative to object? 4. Real or virtual?

Question 29

What do U do when asked to identify trend?

Answer 29

State 2 evidences of data points supporting theory on trend, look for r squared values, and describe the trend.

Question 30

How to contrast experimental value with accepted value?

Answer 30

% error = (accepted - exp) / accepted X 100

Question 31

Deduce the quantity of an object using a trendline. But go into detail only when it says INTERPRET.

Answer 31

State the gradient of graph was ... Identify whether trendine was linear to determine whether gradient is constant. And determine acceleration.