Exercise : Update Driver Safety Advisements
Situation
Star light fluctuates at various rates per hour, from tiny, rapid variations to
longer-term changes spanning days or weeks, and can be caused by phenomena like
pulsations, eclipsing binaries, and exoplanet transits.
Legal requirements and reporting
Number plate test: You must be able to read a number plate from 20 meters away,
with glasses or contact lenses if you need them.
Visual acuity: You need a visual acuity of at least\(6/12) (decimal (0.5)).
Field of vision: You must have an adequate field of vision, which your
optician can test.
Report any conditions: If you have a vision condition that affects your
driving, you must report it to the DVLA.
Get professional advice: If you have any doubt about your ability to meet the
legal standards, consult your GP, optician, or eye specialist.
The practical driving test eyesight test
At the start of your practical driving test you have to correctly read a
number plate on a parked vehicle.
If you cannot, you’ll fail your driving test and the test will not continue.
DVLA will be told and your licence will be revoked.
When you reapply for your driving licence, DVLA will ask you to have an
eyesight test with DVSA. This will be at a driving test centre. If you’re
successful, you’ll still have to pass the DVSA standard eyesight test at
your next practical driving test.
Causes of star light fluctuations
Pulsating variables:
- stars expand and contract, causing their brightness to pulsate.
Eclipsing binaries:
- two stars orbit each other. When one star passes in front of the other,
it blocks its light, causing a dip in the total brightness
Exoplanet transits:
- planet passing in front of its star can cause a periodic dip in the
star's light
Dust and debris:
- clouds of dust, possibly from comets or other debris, passing in front
of the star.
Explosive variables:
- novae and supernovae undergo sudden and dramatic increases in brightness,
followed by a relatively rapid dimming.
Gravitational microlensing:
- massive object passing in front of a background star can bend and magnify
the star's light
...
...wouldn't it go dim...?...
[ with all the blocking materials as quoted ?]
...mmm...
...and then un back up...!...
[ then fluxes back up to full brightness ]
...yeah...
...it's that...!...
…
...so...!?…
...may be a/ source...
...our...
...of impaired vision...
...getting reports of
..."flashes and floaters"...
...yes...
...do concur...
...oooh..and we...
...ahh....
...then wathc...when driving …
..do...!...
...we'll leave an extra yard...
...do...
...and you...
...mmm...
...ehhh…
..until it clear...
...then in all... clear...
...ohh…
…
...can be at the end...
...that...!...
…
...ohh…!?…
...only a bit...
...mmmm…
…
...I got to be there on time...!...
...may go in on wong…!?...
...
...oh we don't slow...!...
...nor we...!...
…
...uh do....
...don't...
...when...
...you know...
...may vary...
...uhhh…
…
...can we get that on forecast...
...mmm-hmmm...
...then in...
- google traffic maps ? extra warning message ?
...what...
- Map Layers menu -> Traffic -> see Live Traffic
- and red or green... is slow flowing or fast flowing
…
...it is...!...
...then request extra message...
...will...
...light level [fluctuations]…
...or similar...
..oh...
...put high...
...then low...
...when...
...on live traffic...
...oh...!...
...mmm...
…
...hey...
...ehh….
...wouldn't you go blind...when in at one up...
...we do...!...
…
...uhhh…!... ...
...when...!?...
…
...get worse in the future...?...!...
...it might...!...
...will...!...
...euuuh…
...then get me sunnies…
[tinted sunglasses]
...mmm...
...mmm...
...then i'll back...
...woooh time we do...!...
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