Yes, I agree with your analysis. Bill G. In a message dated 1/5/01 9:32:08 AM Eastern Standard Time, [EMAIL PROTECTED] writes:
> Bill, > > That's a really nice idea... but, I assume you are using a theoretically > ideal, zero width slot at infinite distance, to get your 1/240 of a degree > per second (time). Then don't you mean 15"/sec not 15'/sec. Your device > seems to be theoretically accurate to 15" or 1/4 of a minute (angular) per > each second! BUT only in theory, as very thin slots, which for me are about > .010 inch wide, or 4 sheets of paper, which are spaced about 10 inches > apart; have an included angle of 3.44'. This means that a zero width sun, > or better yet a star, will shine thru your slot for about 13 seconds. So in > reality, the width of the slot, the actual time the light is visible, and > other finite realities seem like they will have a major effect of your > readings. > > What do you think? > > Fritz >
