Physics quest

Question 1

Concave mirror SALT
Beyond C

Answer 1

S- smaller
A- inverted
L- between C and F
T-real

Question 2

Concave mirror SALT
At C

Answer 2

S- same size
A- Inverted
L- At C
T- real

Question 3

Concave mirror SALT
between F and C

Answer 3

S- Bigger
A- Inverted
L-Beyond C
T- Real

Question 4

Concave mirror SALT
at F

Answer 4

no image formed

Question 5

Concave mirror SALT
before F

Answer 5

S- Bigger
A- upright
L- behind the mirror
T- virtual

Question 6

Convex mirror SALT

Answer 6

S- smaller
A- upright
L- behind the mirror
T- virtual

Question 7

Converging lens SALT
Beyond 2F’

Answer 7

S-smaller
A- inverted
L- between 2F and F

Question 8

Converging lens SALT
2F’

Answer 8

S- Same size
A- inverted
L- at 2 F
T- real

Question 9

Converging lens SALT
Between 2F’ and F’

Answer 9

S-Larger
A- Inverted
L- beyond 2F
T- real

Question 10

Converging lens SALT
At F’

Answer 10

no image formed

Question 11

Converging lens SALT
Inside F’

Answer 11

S-Larger
A- Upright
L- behind the objects on the same side as the lens
T- virtual

Question 12

Diverging lens

Answer 12

S- smaller
A- upright
L- beyond object and lens
T- virtual

Question 13

Snells law

Answer 13

n1sinθ1 = n2sinθ2
n1 and n2 are the indices of refraction for the
two media

The angle of incidence is θ1 and the angle of
refraction is θ2

the light ray bends away from the normal if θ2 is greater than θ1

the light ray bends towards the normal if θ2 is less than θ1

Question 14

Cornea:

Answer 14

○A convex dome of clear tissue up in front of the eye that focuses light as it passes through

○Light is refracted more through cornea than lens

Question 15

Iris

Answer 15

○Behind the cornea

○Controls amount of light entering through the pupil

Question 16

Pupil

Answer 16

○ controls amount of light going into the eye using muscles

Question 17

Accommodation

Answer 17

○ changing of the shape of lens by eye muscles to allow a sharply focused image to form on the retina

Question 18

Lens

Answer 18

○Transparent cells

○Projects light onto the retina

○Converging lens

Question 19

Ciliary Body

Answer 19

○Holds the lens in place

○Connected with the iris

○Changes shape of lens to change focus

○THICKER: to see something near

Question 20

Retina

Answer 20

○Back wall of eyeball where light is focused

○Has millions of light sensitive cells

○Converts light signals to electrical signals

Question 21

Optic Nerve: (transmission)

Answer 21

○Carries the electrical signals to the brain

○Blind spot: there are no light sensitive cells in this area

■Having two eyes makes up for this

Question 22

Brain

Answer 22

○Translates electrical signals into an image

○Image is turned upright

Question 23

Sclera:

Answer 23

○White of eye
○Tough protective coating

Question 24

Blinking:

Answer 24

Protects and moistens the eye

Question 25

Aqueous Humour:

Answer 25

○Watery fluid between the cornea and lens ○Maintains structure of front part of eye ball

Question 26

Vitreous Humour:

Answer 26

○Clear, jelly-like between lens and retina ○Maintains shape and serves to press retina against inside wall of eyeball

Question 27

Hyperopia

Answer 27

Far sighted (can see far objects) What’s happening? Cannot refract the light rays enough to form an image on the retina Causes: Shortened eyeball Weak cornea-lens combination Correction Converging lens (increases refraction)

Question 28

Special Case- Presbyopia

Answer 28

Special case of hyperopia Loss of accommodation due to loss of lens elasticity Age-related ○ Not related to a shortened eyeball ! Can be corrected in the same way as hyperopia

Question 29

Myopia

Answer 29

Near sighted (can see near objects) What’s happening? Refracts the light rays too much Causes: Elongated eyeball Very strong cornea-lens combination Correction Diverging Lens (decreases refraction)

Question 30

Eye Problems- No Problem

Answer 30

Accommodation occurs without a problem making a sharply focused image S: smaller A: inverted L:retina T:real