Isn’t 1.2 micrometer wavelength equal to 1200 nm, putting it in the infrared? Still you would be better off in space then. The rest of the calculations look plausible to me, but I’m not the expert.
I felt "by eye" without calculations that the telescope diameter was insufficient... 😂 The calculations are correct, anyway. 400 pc at a distance of 51 Mpc equals an angle of 400/51000000 rad. One radian equals 206265 asec. So, simplifying: 4/510000*206265=1.617 asec. And... 1.22*1.2/120000*206265=2.516 asec
I feel a little smarter today. 😊 Thanks for sharing Andy.
Hi Andy I enjoyed this mate ,, nice to see your workings
We used to have people "do the math" whenever they thought that, say, Hubble, could read license plates.
Isn’t 1.2 micrometer wavelength equal to 1200 nm, putting it in the infrared? Still you would be better off in space then. The rest of the calculations look plausible to me, but I’m not the expert.
Correct. Red is about 0.6 - 0.7 um, and blue about 0.4 um, so 1.2 um is beyond red, infrared.
It’s a trick: the question says “which of the following *applied on its own*”. So if you checked anything other than “put it in space” you are wrong.
I felt "by eye" without calculations that the telescope diameter was insufficient... 😂 The calculations are correct, anyway. 400 pc at a distance of 51 Mpc equals an angle of 400/51000000 rad. One radian equals 206265 asec.
So, simplifying:
4/510000*206265=1.617 asec.
And...
1.22*1.2/120000*206265=2.516 asec
Not up on the exact formulations, but would probably put 1.61 arcsec as 1.6088 would round up to 1.61 (2 decimal places).
Totally lost me 😂😂😂