Reflecting telescopes have many advantages over refracting telescopes. Mirrors don’t cause chromatic aberration and they are easier and cheaper to build large. The are also easier to mount because the back of the mirror can be used to attach to the mount. Reflecting telescopes have a few disadvantages as well.
Q. Why is there a size limit on refracting telescope explain?
Refracting Telescope Limits: Both scopes capture light and magnify the images coming through them. The larger the size, the more light and better images one gets.
Table of Contents
- Q. Why is there a size limit on refracting telescope explain?
- Q. How would you increase the brightness of an image formed by astronomical telescope?
- Q. Who first made a Newtonian reflecting telescope with a concave objective mirror?
- Q. Is the image through a telescope real or virtual?
- Q. Is side mirror real or virtual?
- Q. Do convex lenses always form real images?
- Q. Which type of image Cannot be obtained by a convex lens?
- Q. Which type of image can be obtained by concave mirror?
Q. How would you increase the brightness of an image formed by astronomical telescope?
The surface brightness of an the image (really the intensity at a given point) is proportional to the area of the exit pupil, that beam of light you look at, the beam that enters your eye. The larger the exit pupil, the brighter the image. The greater the magnification, the smaller the exit pupil.
Q. Who first made a Newtonian reflecting telescope with a concave objective mirror?
Alternative Title: reflector Isaac Newton’s reflecting telescope, 1668. James Gregory’s telescope design (1663) uses two concave mirrors—a primary parabolic-shaped mirror and a secondary elliptic-shaped mirror—to focus images in a short telescope tube.
Q. Is the image through a telescope real or virtual?
The telescope is designed so the real, inverted image created by the first lens is just a little closer to the second lens than its focal length. As with the magnifying glass, this gives a magnified virtual image. This final image is also inverted compared to the original object.
Q. Is side mirror real or virtual?
A real image is a true image that forms in front of a mirror where reflected light rays actually meet. A virtual image appears to be on the other side of the mirror and doesn’t really exist. Most mirrors are plane mirrors that have a flat reflective surface.
Q. Do convex lenses always form real images?
Convex (converging) lenses can form either real or virtual images (cases 1 and 2, respectively), whereas concave (diverging) lenses can form only virtual images (always case 3). Real images are always inverted, but they can be either larger or smaller than the object.
Q. Which type of image Cannot be obtained by a convex lens?
diminished and virtual is not possible that is in the concave lens. A convex lens can form both real as well as a virtual image but a concave lens cannot form a real image.
Q. Which type of image can be obtained by concave mirror?
Concave mirrors form both real and virtual images. When the concave mirror is placed very close to the object, a virtual and magnified image is obtained and if we increase the distance between the object and the mirror, the size of the image reduces and real images are formed.
