The reflecting telescope - class-XII
Description: the reflecting telescope | |
Number of Questions: 47 | |
Created by: Nitesh Divan | |
Tags: option c: imaging optics observing space: telescopes universe and space science physics universe and space ray optics and optical instruments |
A reflecting telescope has a large mirror for its objective with radius of curvature equal to 80 cm. The magnifying power of this telescope if eye piece used has a focal length of 1.6 cm is:
A telescope is used to resolve two stars separated by $4.6 \, \times \, 10^{-6}$ rad. If the wavelength of light used is 5460 $\overset{0}{A}$, what should be the aperture of the objective of the telescope?
If you want to make Refracting Telescope, what components will you choose ?
Scientists identify the elements that are burning in the stars by using which of the following devices?
Two convex lenses of focal length 0.3 m and 0.05 m are used to make a telescope. The distance kept between them is equal to
In an astronomical telescope of refracting type:
Four lenses of focal length $+15cm,+20cm,+150cm$ and $+250cm$ are available for making an astronomical telescope. To produce the largest magnification, the focal length of the eyepiece should be
A reflecting telescope utilises :
This question has Statement-1 and Statement-2. Of the four choices given after the Statements, choose the one that best describes the two Statements.
Statement 1 : Very large size telescopes are reflecting telescopes instead of refracting telescopes.
Statement 2 : It is easier to provide mechanical support to large size mirrors than large size lenses.
In the spectrum of light from a star, the wavelength of a particular line is measured to be $4747 $, while the actual wavelength of the line is $4700 $. What is the relative velocity ?
The objective of a telescope A has diameter 3 times that of the objective of telescope B, How much greater amount of light is gathered by A as compared to B?
In telescope, ratio of resolving power due to light of $\lambda=400\mathring {A}$ and $\lambda =6000\mathring {A}$ is ______
For an electron microscope, which of the following is false ?
If an object subtend angle of $2^o$ at eye when seen through telescope having objective and eyepiece of focal length $f = 60\, cm $and $f = 5\, cm$ respectively than angle subtend by image at eye piece will be
A telescope has an objective of focal length $50 cm$ and an eye-piece of focal length $5 m$ THe least distance of distinct vision is $25 cm$. The telescope is focused for distinct vission a scale $200 cm$ away from the objective.The separation between the two lenses is nearly
Match the items given in A, B, C and D against their corresponding description given in 1, 2, 3, 4 and 5.
A. Astronomical telescope
B. Galilean Telescope
C. Simple Microscope
D. Compound Microscope
1. Contains one convex lens
2. Contains one concave lens
3. Contains a convex lens of large focal length in the objective and a convex lens of small focal length in the eye-piece
4. Contains a convex lens of small focal length in the objective and a convex lens of large focal length in the eye-piece
5. Contains a convex lens of large focal length in the objective and a concave lens of small focal length in the eye-piece.
The sum of the focal lengths of the objective and an eyepiece, In case of an astronomical telescope is equal to : ( final image is at $\infty$)
By which instrument we collect the space information:
The focal lengths of the objective and the eyepiece of an astronomical telescope are 20 cm and 5 cm respectively. If the final image is formed at a distance of 30 cm from the eyepiece, find the separation between the lenses required for distinct vision
The focal length of the objective of an astronomical telescope is 1 m and it is in normal adjustment.Initially the telescope is focussed to a heavenly body. If the same telescope is to be focussed to an object at a distance of 21 m from the objective,then identify the correct choice
The focal lengths of the objective and eyepiece of a telescope are 60cm and 5cm respectively.The telescope is focused on an object 360cm from the objective and the final image is formed at a distance of 30cm from the eye of the observer. The length of the telescope is
In which of the following instruments is the final image virtual?
A planet is observed by an astronomical reflecting telescope having an objective of focal length $16 m$ and an eye-piece of focal length $2 cm$. Then :
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of
Which of the following is not a fact about Hubble Telescope?
Which of the following is not a part of HST?
DSN is a deep space network tracking station is
Which of the following is an early drawback of HST?
Which of the following is correct statement regarding HST?
What is the average speed of the Hubble telescope?
The Hubble Space Telescope is scheduled to retire in which of the following year?
Fill in the blank.
Hubble transmits about _____ of raw science data every week.
The Corrective Optics Space Telescope Axial Replacement (COSTAR) system was designed to correct the _______________________ for light focused at the FOC, FOS, and GHRS.
Astronomical data taken with ________________ must undergo several calibration steps before they are suitable for astronomical analysis
The unique window(s) on the Universe enabled by Hubble is/are :
All images from Hubble are ___________________,in which its cameras incorporate a variety of filters each sensitive to specific wavelengths of light.
The GHRS was a spectrograph designed to operate in the ___________.
To fit the COSTAR system onto the telescope, one of the other instruments had to be removed, and astronomers selected the________________________to be sacrificed.
Hubble's four main instruments observe in the near
Which of the following instruments is used for seeing details of celestial bodies?
The Hubble Space Telescope is designed with ____________ hyperbolic mirrors is known for good imaging performance over a wide field of view.
Which among the following is not true for Hubble ST?
What is full form of GMRT ?
In an oscilloscope the vertical deflecting plates deflect the electron beam in a vertical plane.
An observer looks at a distant tree of height 10 m with a telescope of magnifying power of 20. To the observer the tree appears:
The focal length of objective and eye-piece of a telescope are $200\ cm$ and $5\ cm$ respectively. Final image is formed at least distance of distinct vision. The magnification of telescope is