NEET Physics: Microscope and Astronomical Telescope Practice Questions
15 free multiple-choice questions on Microscope and Astronomical Telescope (Optics) for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. The magnification achieved by an astronomical telescope is primarily determined by the combination of which two elements?
Show answer & explanation
Correct answer: C — The focal length of the objective and the focal length of the eyepiece
The magnification of a telescope is the product of the magnification provided by the objective lens and the magnification provided by the eyepiece.
Q2. Which type of lens is primarily used in astronomical telescopes to gather light from distant objects?
Show answer & explanation
Correct answer: B — Convex Lens
Convex lenses are used in telescopes as objective lenses because they are capable of converging light rays entering the instrument and forming an image on the eyepiece plane.
Q3. Which type of lens is used in a compound microscope to produce a magnified image of a specimen?
Show answer & explanation
Correct answer: C — Convex lens
Convex lenses are used in the objective and eyepiece of a microscope because they are converging lenses capable of forming magnified images of objects.
Q4. In the context of a simple microscope, what kind of image is typically formed when viewing a specimen using the eyepiece?
Show answer & explanation
Correct answer: A — Virtual and magnified
Simple microscopes, when used for viewing objects, rely on the properties of the lens system to produce a virtual, magnified image.
Q5. The angular magnification of a telescope is primarily determined by the ratio of the focal lengths of the objective lens and the eyepiece. This relates to which principle?
Show answer & explanation
Correct answer: B — Refraction
The angular magnification in a telescope is based on the geometric relationship involving the objective lens and the eyepiece, which are both lens systems operating on refraction principles.
Q6. In an astronomical telescope, the objective lens is primarily responsible for which property?
Show answer & explanation
Correct answer: C — Gathering light
The objective lens (or objective lens system) is designed to gather as much light as possible from the distant object and form an initial, magnified image.
Q7. In an astronomical telescope, what is the main purpose of the eyepiece?
Show answer & explanation
Correct answer: A — To magnify the image formed by the objective lens
The eyepiece acts as a simple magnifier to view the image formed by the objective lens, thus increasing the final observed magnification.
Q8. Which lens system in an astronomical telescope is responsible for forming the final, magnified image?
Show answer & explanation
Correct answer: C — Eyepiece lens
The eyepiece (eyepiece lens) acts as the final magnifying lens, taking the image formed by the objective lens and magnifying it for the human eye.
Q9. In a simple microscope, what is the primary function of the objective lens?
Show answer & explanation
Correct answer: D — To produce an inverted and magnified real image
The objective lens is responsible for forming the initial magnified image of the specimen, which is real and inverted, allowing the observer to view the sample.
Q10. What is the primary function of the objective lens in a simple microscope?
Show answer & explanation
Correct answer: A — To collect light and form a magnified image
The objective lens is the main lens that interacts with the specimen and gathers light to form the initial, magnified image.
Q11. In a simple microscope, the image formed is always:
Show answer & explanation
Correct answer: C — Real and upright
A simple microscope, when used to view small objects, typically forms a real, inverted, and magnified image, similar to a magnifying glass effect.
Q12. In an optical instrument, what physical limit determines the ability to distinguish between two closely spaced objects?
Show answer & explanation
Correct answer: B — Resolving power
Resolving power is the ability of an optical instrument to distinguish between two closely spaced objects; it limits the detail that can be seen.
Q13. Which type of telescope is primarily used for observing distant celestial objects like stars and planets?
Show answer & explanation
Correct answer: A — Reflecting telescope
Reflecting telescopes use mirrors to gather light, making them suitable for observing extremely distant astronomical objects.
Q14. Which type of lens is typically used as the objective lens in a compound microscope?
Show answer & explanation
Correct answer: C — Convex lens
A convex lens is used as the objective lens in microscopes because it is capable of forming a real, magnified image.
Q15. The main difference between a refracting telescope and a reflecting telescope lies in the method of light manipulation. Which characteristic defines a reflecting telescope?
Show answer & explanation
Correct answer: C — It uses mirrors
Reflecting telescopes use mirrors to reflect the light path, whereas refracting telescopes use lenses to refract the light path.
Keep going — practice on Padhai Karlo
Padhai Karlo gives you unlimited NEET practice: chapter-wise questions, timed quizzes, and full mock tests with an All-India Rank — free to start.
Get the free Android app →