OPTICS Science Exam Gr10

Question 1

Identify and describe the three main types of materials

Answer 1

Transparent - transmits all or most light
Translucent - transmits some light, reflects/absorbs the rest
Opaque - reflects or absorbs all light

Question 2

What material is a mirror?

Answer 2

Opaque

Question 3

What material is a wood table?

Answer 3

Opaque

Question 4

What material is wax paper?

Answer 4

Translucent

Question 5

What material is a window?

Answer 5

Transparent

Question 6

What are the 3 laws of reflection?

Answer 6

-The angle of incidence is equal to the angle of reflection
-The incident ray, the normal, and reflected ray are on the same plane
- The incident ray and reflected ray are on opposite sides of the normal line

Question 7

Explain the process of refraction.

Answer 7

Refraction is the bending of light as it passes through two different materials

Question 8

What does SALT stand for?

Answer 8

S - Size
A - Altitude
L - Location
T - Type
Used to state image characteristics

Question 9

What does SOFA stand for?

Answer 9

Slow to Fast, Away
O doesn’t mean anything

Question 10

What does FAST stand for?

Answer 10

Fast to Slow, Towards
A doesn’t mean anything

Question 11

SALT characteristics for objects beyond/behind C?

Answer 11

S - smaller
A - inverted
L - between c and f
T - real

Question 12

SALT characteristics for objects between C and F?

Answer 12

S - larger
A - inverted
L - beyond c
T - real

Question 13

SALT characteristics for objects at F?

Answer 13

NO IMAGE for all

Question 14

SALT characteristics for objects at C?

Answer 14

S - same size
A - inverted
L - at c
T - real

Question 15

SALT characteristics for objects between F and V?

Answer 15

S - larger
A - upright
L - behind mirror
T - virtual

Question 16

What type of image is formed when object is behind F

Answer 16

Real image

Question 17

What type of image is formed when object is on F

Answer 17

No image

Question 18

What type of image is formed when object is between F and V/mirror

Answer 18

Virtual image

Question 19

What does C stand for

Answer 19

Center of Curvature

Question 20

What does R stand for

Answer 20

Radius of Curvature

Question 21

What is the principal axis?

Answer 21

The line through C that passes through the middle of the mirror

Question 22

What does V stand for

Answer 22

Vertex, the point where the PA meets the mirror

Question 23

What does F stand for

Answer 23

Focal Point

Question 24

What is halfway between V and C?

Answer 24

F

Question 25

What is always twice as large as the focal length

Answer 25

R

Question 26

What does f* stand for

Answer 26

Focal Length (distance of F to V)

Question 27

Step-by-step ray rules (mirror)

Answer 27

1. Top of object to mirror (parallel to PA)
2. Top of object through F
3. From ray 2, mirror through F
4. From ray 1, mirror then parallel to PA

Question 28

Step-by-step ray rules (convex lens)

Answer 28

1. Top of object to mirror (parallel to PA) / Hit F
2. Top of object through F / parallel to PA
3. Hit V. Keep going straight ALL THE WAY

Question 29

Step-by-step ray rules (concave lens)

Answer 29

1. Parallel to PA, refracts Up
2. End that hits mirror hits F
3. Straight through optical centerm

Question 30

What sorts of image do concave lenses always produce?

Answer 30

Smaller, upright, virtual images

Question 31

What kinds of image do convex lenses always produce?

Answer 31

Inverted and real

Question 32

How many digits to you round to when using Snell’s Law?

Answer 32

6

Question 33

What is the universal wave equation

Answer 33

v = fλ
(velocity equals frequency times wavelength)

Question 34

What is the unit for velocity (speed)

Answer 34

m/s (milliseconds)

Question 35

What is the unit for frequency

Answer 35

Hz (hertz)

Question 36

What’s the refractive index formula

Answer 36

n = c/v
(n = index of refraction
c = speed of light in a vacuum
v = speed of light in substance)

Question 37

What is the speed of light?

Answer 37

3.00 x 10⁸ m/s