MCQ on Telescope:
1. What is telescope?
A. A telescope is an instrument used to observe very close objects
B. Both the eyepiece and objective in a telescope are concave lenses
C. A telescope is an instrument used to observe very small objects in the distance
D. A telescope is an instrument used to observe large objects in the distance
Answer: D. A telescope is an instrument used to observe large objects in the distance.
Explanation: A telescope is an optical instrument designed to magnify distant objects, allowing them to be observed more clearly and in greater detail. It is commonly used for astronomical observations and terrestrial viewing.
2. The first to use a telescope for scientific research was an Italian physicist_______
A. Newton
B. Galileo
C. Franklin
D. Kepler
Answer: B. Galileo
Explanation: Galileo Galilei, an Italian physicist and astronomer, was the first to use a telescope for scientific purposes, making significant observations of celestial bodies such as the Moon, planets, and stars.
3. In which telescope length is comparatively less?
A. Internal focusing telescope
B. External focusing telescope
C. none
D. all
Answer: A. Internal focusing telescope
Explanation: An internal focusing telescope typically has a shorter overall length compared to an external focusing telescope, where the focus is adjusted by moving the eyepiece along the tube.
4. A telescope can make stars look
A. bigger
B. brighter
C. smaller
D. all of above
Answer: B. Brighter
Explanation: Telescopes gather more light from distant stars, making them appear brighter and more visible than they would with the naked eye.
5. Who was the first person to use telescope to view the sky?
A. Giordano Bruno
B. Johannas Kepler
C. Galileo Galelei
D. King Frederic II
Answer: C. Galileo Galilei
Explanation: Galileo Galilei was the first person to use a telescope to observe celestial objects, leading to groundbreaking discoveries in astronomy.
6. What we see through the telescope is like______
A. the size of the object
B. reduced image
C. enlarged image
D. There are three cases
Answer: B. Reduced image
Explanation: The image seen through a telescope is typically magnified but reduced in size compared to the actual object being observed.
7. ______ : ship :: telescope : star
A. deck
B. water
C. periscope
D. astronomy
Answer: C. Periscope
Explanation: A periscope is used to view objects (like a ship) from a submerged position; similarly, a telescope is used to view stars from a distance.
8. A telescope that uses two converging lenses is called
A. reflecting telescope
B. refracting telescope
C. simple telescope
D. compound microscope
Answer: B. Refracting telescope
Explanation: A refracting telescope uses lenses to gather and focus light, typically with an objective lens and an eyepiece lens.
9. Modern astronomical telescopes strive to increase the aperture of the objective lens in order to observe fainter stars. The purpose of increasing the aperture is__________
A. gather more light
B. Imaging brighter
C. Increase the viewing angle
D. None of the above statements are correct
Answer: A. Gather more light
Explanation: Increasing the aperture (diameter of the objective lens or mirror) of a telescope allows it to collect more light, enabling the observation of fainter celestial objects.
10. Which of the following statements about telescopes is incorrect_________
A. All telescopes are made of two convex lenses
B. The objective lens of the telescope can be a concave mirror
C. We see distant cars getting smaller and smaller because their view to our eyes is diminishing
D. The objective lens (convex lens) of the telescope forms a reduced real image
Answer: A. All telescopes are made of two convex lenses
Explanation: This statement is incorrect because telescopes can use combinations of lenses and mirrors, including concave and convex elements.
11. Which of the following statements about telescopes is correct_______
A. The eyepiece of the telescope is a concave lens
B. The objective lens of the telescope becomes a magnified virtual image
C. The objective lens of the telescope is a reduced real image
D. The smaller the diameter of the objective lens of the telescope, the better
Answer: C. The objective lens of the telescope is a reduced real image
Explanation: The objective lens of a telescope forms a real image that is typically magnified but reduced in size compared to the actual object.
12. The angle of field of the telescope________
A. is independent of the size of the object galss
B. increases as the size of the eye piece increases
C. decreases as the distance between eye piece and object increases
D. all of the above
Answer: D. All of the above
Explanation: The angle of field of view in a telescope can vary based on the size of the object glass (lens), the eyepiece, and the distance between them.
13. The cross hairs in the surveying telescope are placed
A. midway between eye piece and objec¬tive lens
B. much closer to the eye-piece than to the objective lens
C. much closer to the objective lens than to the eye piece
D. anywhere between eye-piece and objective lens
Answer: B. Much closer to the eye-piece than to the objective lens
Explanation: Cross hairs or reticles in a surveying telescope are typically located closer to the eyepiece, aiding in precise targeting and measurement during observations.