M*u
2 楼
好高级
看来光是一坨一坨的,不是波,也不是粒子
看来光是一坨一坨的,不是波,也不是粒子
H*g
3 楼
应该靠谱,一纳秒跑1尺嘛。光还是很慢的。
u*q
5 楼
PSed
H*g
6 楼
现在经常说飞秒激光,那就是0.3微米长的一坨光。
H*7
7 楼
激光本来就是不发散才叫激光,怎么会散射这么严重?
w*a
8 楼
既然想显示激光的路径,那么这砣激光粒子根本就不可能成像在底片上。
H*g
13 楼
http://en.wikipedia.org/wiki/Streak_camera
A streak camera is an instrument for measuring the variation in a pulse of
light's intensity with time. They are used to measure the pulse duration of
some ultrafast laser systems and for applications such as time-resolved
spectroscopy and LIDAR.
A streak camera is an instrument for measuring the variation in a pulse of
light's intensity with time. They are used to measure the pulse duration of
some ultrafast laser systems and for applications such as time-resolved
spectroscopy and LIDAR.
v*s
14 楼
streak camera响应时间是纳秒级的,没法看飞秒激光。
of
【在 H********g 的大作中提到】
: http://en.wikipedia.org/wiki/Streak_camera
: A streak camera is an instrument for measuring the variation in a pulse of
: light's intensity with time. They are used to measure the pulse duration of
: some ultrafast laser systems and for applications such as time-resolved
: spectroscopy and LIDAR.
of
【在 H********g 的大作中提到】
: http://en.wikipedia.org/wiki/Streak_camera
: A streak camera is an instrument for measuring the variation in a pulse of
: light's intensity with time. They are used to measure the pulse duration of
: some ultrafast laser systems and for applications such as time-resolved
: spectroscopy and LIDAR.
u*q
22 楼
激光能量这么高,为什么没把镜子打个洞?
H*g
25 楼
嗯,看起来1飞秒的确还不算很短。那再短1000倍,是啥效果?要短到什么程度,电子
会不是云?电子到底会不会不是云?
1.3 fs – cycle time for 390 nanometer light, at the transition between
violet visible light and ultraviolet[5]
2.57 fs – cycle time for 770 nanometer light, at the transition between red
visible light and near-infrared[5]
15 fs – the swiftest chemical reaction, such as the absorption of a light
photon in the Photosynthetic antenna molecule
200 fs – the average chemical reaction, such as the reaction of pigments in
an eye to light[5]
300 fs – the duration of a vibration of the atoms in an iodine molecule[6]
【在 T******e 的大作中提到】
: 1飞秒场都传播三百纳米了,原子大小是亚纳米的,感觉能干很多啊
会不是云?电子到底会不会不是云?
1.3 fs – cycle time for 390 nanometer light, at the transition between
violet visible light and ultraviolet[5]
2.57 fs – cycle time for 770 nanometer light, at the transition between red
visible light and near-infrared[5]
15 fs – the swiftest chemical reaction, such as the absorption of a light
photon in the Photosynthetic antenna molecule
200 fs – the average chemical reaction, such as the reaction of pigments in
an eye to light[5]
300 fs – the duration of a vibration of the atoms in an iodine molecule[6]
【在 T******e 的大作中提到】
: 1飞秒场都传播三百纳米了,原子大小是亚纳米的,感觉能干很多啊
H*g
29 楼
10e-18 埃托秒
1 attosecond: the time it takes for light to travel the length of three
hydrogen atoms
12 attoseconds: record for shortest time interval measured as of 12 May 2010
[5]
24 attoseconds: the atomic unit of time
67 attoseconds: the shortest pulses of laser light yet created[6]原来现在有
这么短的脉冲啊
100 attoseconds: fastest ever view of molecular motion[7]
200 attoseconds (approximately): half-life of beryllium-8, maximum time
available for the triple-alpha process for the synthesis of carbon and
heavier elements in stars
320 attoseconds: estimated time it takes electrons to transfer between atoms
[8]
10e-21 zeptosecond
7 zs: half-life of helium-9's outer neutron in the second nuclear halo.
17 zs: approximate period of electromagnetic radiation at the boundary
between gamma rays and X-rays.
300 zs: approximate typical cycle time of X-rays, on the boundary between
hard and soft X-rays.
500 zs: current resolution of tools used to measure speed of chemical
bonding[6]
10e-24 yoctosecond
0.3 ys: mean life of the W and Z bosons.[4][5][a]
0.5 ys: time for top quark decay, according to the Standard Model.
1 ys: time taken for a quark to emit a gluon.
23 ys: half-life of 7H.
10e-44 Planck time. The time required to travel one Planck length at the
speed of light (c)
5.4×10−20 ys = 5.4×10−44 s: One Planck time tP = sqrt{hbar G/c
^5} ≈ 5.4×10−44 s[2] is the briefest physically meaningful span of
time. It is the unit of time in the natural units system known as Planck
units.
red
in
【在 H********g 的大作中提到】
: 嗯,看起来1飞秒的确还不算很短。那再短1000倍,是啥效果?要短到什么程度,电子
: 会不是云?电子到底会不会不是云?
: 1.3 fs – cycle time for 390 nanometer light, at the transition between
: violet visible light and ultraviolet[5]
: 2.57 fs – cycle time for 770 nanometer light, at the transition between red
: visible light and near-infrared[5]
: 15 fs – the swiftest chemical reaction, such as the absorption of a light
: photon in the Photosynthetic antenna molecule
: 200 fs – the average chemical reaction, such as the reaction of pigments in
: an eye to light[5]
1 attosecond: the time it takes for light to travel the length of three
hydrogen atoms
12 attoseconds: record for shortest time interval measured as of 12 May 2010
[5]
24 attoseconds: the atomic unit of time
67 attoseconds: the shortest pulses of laser light yet created[6]原来现在有
这么短的脉冲啊
100 attoseconds: fastest ever view of molecular motion[7]
200 attoseconds (approximately): half-life of beryllium-8, maximum time
available for the triple-alpha process for the synthesis of carbon and
heavier elements in stars
320 attoseconds: estimated time it takes electrons to transfer between atoms
[8]
10e-21 zeptosecond
7 zs: half-life of helium-9's outer neutron in the second nuclear halo.
17 zs: approximate period of electromagnetic radiation at the boundary
between gamma rays and X-rays.
300 zs: approximate typical cycle time of X-rays, on the boundary between
hard and soft X-rays.
500 zs: current resolution of tools used to measure speed of chemical
bonding[6]
10e-24 yoctosecond
0.3 ys: mean life of the W and Z bosons.[4][5][a]
0.5 ys: time for top quark decay, according to the Standard Model.
1 ys: time taken for a quark to emit a gluon.
23 ys: half-life of 7H.
10e-44 Planck time. The time required to travel one Planck length at the
speed of light (c)
5.4×10−20 ys = 5.4×10−44 s: One Planck time tP = sqrt{hbar G/c
^5} ≈ 5.4×10−44 s[2] is the briefest physically meaningful span of
time. It is the unit of time in the natural units system known as Planck
units.
red
in
【在 H********g 的大作中提到】
: 嗯,看起来1飞秒的确还不算很短。那再短1000倍,是啥效果?要短到什么程度,电子
: 会不是云?电子到底会不会不是云?
: 1.3 fs – cycle time for 390 nanometer light, at the transition between
: violet visible light and ultraviolet[5]
: 2.57 fs – cycle time for 770 nanometer light, at the transition between red
: visible light and near-infrared[5]
: 15 fs – the swiftest chemical reaction, such as the absorption of a light
: photon in the Photosynthetic antenna molecule
: 200 fs – the average chemical reaction, such as the reaction of pigments in
: an eye to light[5]
p*u
39 楼
完全可以拍出这样的视频,原理是多次平均,视频不是一次拍摄完成的,而是通过高速
快门调制。
http://web.media.mit.edu/~raskar/trillionfps/
【在 c******n 的大作中提到】
快门调制。
http://web.media.mit.edu/~raskar/trillionfps/
【在 c******n 的大作中提到】
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