.

*

fovea Zeon

3)

from

Fermat's

Principle it

!

least

time.

SF = minimal

'

:

.

.

Derivation

‘

.

of

|

.

;

.

6)

egvarions

ah

aR

5

,

and

[Zecause

Frem
h

Vi,

;

Cv,
(Ye, 0)

—

e

}

inversion

Ve

of

trajectory

V

Ve

dA

diag ram , to

tymmerry:

s)
th, Vy):

GA t an
for

>

7):

'"~ = JS cote

go

:
a

Comeé.

Cs

ho,
=

Vive;

Vo

Ch 4+Vo

for

Ach, yeu }
c,=

ee

and

View
VF

— hk

+Vo

A cos9

frem

4)

Vv, -V

mo dh oF - Asin ede
ha

.

dh= ~vi-ve
and
RA

-

i

4)

For

3

°

small
and

|
'

Case

hs

and

{

3

bh A

Weve

= Ts

Fyrom

!

=

A sinedé

sin 6

R=

BEST

_%o

A =
-

dé

tas So

hi Vo

Go,
R =

VirVa

.

Si*® Se

COS @s

tan do % Go
thie Go

Vir Ve

4 AiVo
¥, “Vo

tan Ge

6 @)
LLNL

c)

143

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