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Yes. No.
No.
Longer
Radio Micro Infrared
Yes.Lambda=1.5X 10^7 — 10^4 m
XXXXX
PRINTED BY: [email protected]. Printing is for personal, private use only. No part of this book may be reproduced or transmitted without publisher'sprior permission. Violators will be prosecuted.
0.5 X 10^3 sec
d=3.6 X 10^5 km 1.2 sec4.2X10^14 Hz; IR4.2X10^(-7) mBlue
6X10^6Hz
2X10^10Hz3X10^5m.341 mNo
1.3X10^-2m2.5X10^18Hz
267s1267s
3.97X10^16 m
9.5X10^15m
PHY12, HW7: Work
8) c =d
t, so t =
d
c=
1.5⇥ 1011
3⇥ 108= 5⇥ 10
2s.
9) d = 3.6⇥ 108m, so t =
3.6⇥ 108
3⇥ 108= 1.2 s.
10) c = �f , so f =c
�=
3⇥ 108
7.2⇥ 10�8= 4.2⇥ 10
14Hz.
11) � =c
f=
3⇥ 108
7.14⇥ 1014= 4.2⇥ 10
�7m.
12) f =c
�=
3⇥ 108
49= 6⇥ 10
6Hz.
13) f =c
�=
3⇥ 108
1.5⇥ 10�2= 2⇥ 10
10Hz.
14) � =c
f=
3⇥ 108
103= 3⇥ 10
5m.
� =v
f=
341
103= 3.41⇥ 10
�1m.
15) � =c
f=
3⇥ 108
22.75⇥ 109= 1.3⇥ 10
�2m.
f =c
�=
3⇥ 108
0.12⇥ 10�9= 2.5⇥ 10
18Hz.
16) Radius of earth orbit: 1.5⇥ 1011
m.
Radius of Mars orbit: 2.3⇥ 1011
m.
Closest distance, dc, is the di↵erence of these.
Furthest distance, df, is the sum.
tc =0.8⇥ 10
11
3⇥ 108= 2.67⇥ 10
2s.
tf =3.8⇥ 10
11
3⇥ 108= 1.267⇥ 10
3s.
17) Seconds/year: 60⇥ 60⇥ 24⇥ 365 = 3.15⇥ 107.
d = (3⇥ 108)(4.2⇥ 3.15⇥ 10
7) = 3.97⇥ 10
16m.
18) d = (3⇥ 108)(3.15⇥ 10
7) = 9.5⇥ 10
15m.
