1. Canada owns a share of the Gemini telescopes – two telescopes, one in the Northern...

1. Canada owns a share of the Gemini telescopes – two telescopes, one in the Northern Hemisphere (Hawaii), the other in the Southern Hemisphere (Chile). Each Gemini telescope has an f/1.8 primary mirror which has a diameter of 8.1 metres.

a) What is the ratio of the light-gathering power of a single Gemini telescope to that of my 135 mm refracting telescope at home?

b) What is the focal length (m) of the primary mirror of a Gemini telescope?

c) What is the diffraction limit (arcseconds) of a Gemini primary mirror when observing with light at 470 nm?

d) Define (astrophysical) “seeing” and indicate what typical ground-based seeing is in Hawaii?

Expert Solution

The Gemini Observatory consists of twin 8.1-meter diameter optical/infrared telescopes located on two of the best observing sites on the planet. From their locations on mountains in Hawai'i and Chile, Gemini Observatory's telescopes can collectively access the entire sky.

genius_generous answered 2 years ago

Marco owns one share of stock of Platinum Water Media and one share of stock of...

Marco owns one share of stock of Platinum Water Media and one share of stock of Silver Sun Consulting. The total value of his holdings is 118.33 dollars. Both stocks pay annual dividends that are expected to continue forever. The expected return for Platinum Water Media stock is 14.42 percent and its annual dividend is expected to remain at 7.13 dollars forever. What is the expected return for Silver Sun Consulting stock if its next dividend is expected to be...

Eli owns one share of stock of Indigo River Media and one share of stock of...

Eli owns one share of stock of Indigo River Media and one share of stock of Red Royal Entertainment. The total value of his holdings is 174.83 dollars. Both stocks pay annual dividends that are expected to continue forever. The expected return for Indigo River Media stock is 15.8 percent and its annual dividend is expected to remain at 13.81 dollars forever. What is the expected return for Red Royal Entertainment stock if its next dividend is expected to be...

Two reflecting telescopes have the same angular resolution, but one of them uses visible light, and...

Two reflecting telescopes have the same angular resolution, but one of them uses visible light, and the other uses infrared. Which telescope must have the larger primary mirror?

is canada one society or two or more societie

1. Maritza has one share of stock and one bond. The total value of the two...

1. Maritza has one share of stock and one bond. The total value of the two securities is 1,090 dollars. The bond has a YTM of 12.18 percent, a coupon rate of 11.16 percent, and a face value of 1,000 dollars; pays semi-annual coupons with the next one expected in 6 months; and matures in 17 years. The stock pays annual dividends and the next dividend is expected to be 6.53 dollars and paid in one year. The expected return...

One of the newest major telescopes in the world, the LAMOST telescope in China measures the...

One of the newest major telescopes in the world, the LAMOST telescope in China measures the wavelength spectra of 4000 objects simultaneously. The spectrum of a star tells us what the star is composed of and it tells us how it is moving relative to us. One of the missions of LAMOST is to observe motions of stars in the Milky Way to understand the evolution of our galaxy. The objective mirror diameter of LAMOST is 4.9 meters with a...

A few weeks ago, you shorted sell 100 shares of Gemini Inc. at $60 per share....

A few weeks ago, you shorted sell 100 shares of Gemini Inc. at $60 per share. Your dealer requires 50% initial margin with 25% maintenance margin. Today, the price of the stock is $71 per share. Given this scenario: (1) What is your Total Account Value today (i.e how much total cash and value of the shares are in your account) and (2) What is your Total dollar gain/loss on the shorted shares (ignoring fees, charges and margin) A. (1)...

Hedging with a put option Suppose that an investor owns one share of ABC stock currently...

Hedging with a put option Suppose that an investor owns one share of ABC stock currently priced at $30. The investor is worried about the possibility of a drop in share price over the next three months and is contemplating purchasing put options to hedge this risk. The put option is having a strike of $30 and premium of $1.50. Compute the profit of a a. un-hedged position if the stock price in three months is $25 b. *un-hedged position...

1. Why were the two Keck 400” telescopes placed atop Mauna Kea? 2. What are adaptive...

1. Why were the two Keck 400” telescopes placed atop Mauna Kea? 2. What are adaptive optics designed to overcome? How is this done? 3. Explain the basic principle and goals behind the Very Large Array in Socorro, New Mexico. 4. What are some advantages of radio telescopes over optical telescopes?

Wild irises are beautiful flowers found throughout the United States, Canada, and northern Europe. This problem...

Wild irises are beautiful flowers found throughout the United States, Canada, and northern Europe. This problem concerns the length of the sepal (leaf-like part covering the flower) of different species of wild iris. Data are based on information taken from an article by R. A. Fisher in Annals of Eugenics (Vol. 7, part 2, pp. 179 -188). Measurements of sepal length in centimeters from random samples of Iris setosa (I), Iris versicolor (II), and Iris virginica (III) are as follows...

Question