How to set exposure compensation on Olympus OM5 camera
Admin
It’s called exposure compensation. For example: On your OM-5, you’ll normally see it displayed as ± EV, with a scale such as –3 … 0 … +3. If you’re trying…
Admin
Using Wilkinson Power Divider/Combiner in Radio Interferometry
Hi Andy, The Wilkinson Power Divider/Combiner is a primary component in the adding (or subtracting) and phase switched interferometers. It combines the signals (and noise) from two antennas and implements…
I have the £20 monthly subscription to ChatGPT. I notice new tariff available £7 per month. What is difference?
Yes. The cheaper plan you’re seeing is ChatGPT Go. OpenAI currently lists Go at $8/month in the US, with localized pricing in some countries—which is presumably why you’re seeing about…
40 foot radio telescope at Green Bank Observatory – Andrew acting as hot object
I stood on a chair in front of 40 foot RT and got on and off the chair and it showed up on the old-style pen and paper recorder used…
Review of hydrogen line telescopes at LRO – talk for SARA Eastern Conference at Green Bank Observatory 2 August 2026
https://www.astronomy.me.uk/wp-content/uploads/2026/08/H-Line-Talk-for-SARA-Eastern-Conf-01-060826-DRAFT-010826@1700.pptx
Poem: The Train Going to the Taxi to the Coach to the Plane to the Taxi to the Car to Green Bank Observatory!
By Andrew Thornett On the LRO Busman’s Holiday Summer 2026. I ambled, I hurried, I strolled with delight,Then rushed to the station at dawn’s early light.I boarded, departed, proceeded, set…
If an electron or a black hole has intrinsic properties regardless of whether anyone observes them, why shouldn’t the cat also have a definite state?
This is a deep and important question. The key point is that Schrödinger’s cat was never intended to prove that observation creates reality. In fact, Erwin Schrödinger invented the thought…
Suppose the only thing in the Universe is a single black hole. Can we meaningfully say whether it is spinning?
That’s another profound question, and it touches on active areas of theoretical physics. Suppose the only thing in the Universe is a single black hole. Can we meaningfully say whether…
Suppose there were only one particle in the entire Universe. What would it mean to say it has spin?
That’s an excellent question, and it gets right to the heart of what physicists mean by spin. The short answer is that a fundamental particle’s spin is not literally the…