Optical Instruments And Basics Quiz
Step into the fascinating world of optical instruments with our engaging quiz! Explore the diverse realm of devices designed to manipulate light and enhance our vision. From the humble magnifying glass to the intricate workings of telescopes and microscopes, this quiz will test your knowledge and deepen your understanding of these essential tools. Discover how lenses, mirrors, and other optical components come together to create images and magnify objects with precision. Challenge yourself with questions about the principles behind optical instruments, including refraction, reflection, and diffraction. Test your grasp of terminology and concepts related to focal length, magnification, and Read moreoptical aberrations. Prepare to expand your knowledge and gain a deeper appreciation for the incredible inventions that have shaped our understanding of the universe. Take the Optical Instruments Quiz today and embark on an illuminating journey through the world of optics!
Optical Instruments and Basics Questions and Answers
- 1.
The outer part of the eyeball of a thin layer which is clear and can be penetrated by the light is.....
- A.
Cornea
- B.
Aqueous humor
- C.
Pupil
- D.
Retina
Correct Answer
A. CorneaExplanation
The cornea is the clear, outer layer of the eye that allows light to enter the eye and helps focus it onto the retina. It acts as a protective covering for the iris, pupil, and anterior chamber. The cornea is responsible for about two-thirds of the eye's total focusing power and plays a crucial role in vision clarity.Rate this question:
-
- 2.
What is the function of the pupil?
- A.
Gives colour to the eye
- B.
Regulate the more or little light that enters into the eye
- C.
Making image of properties
- D.
Catcher screen of image
Correct Answer
B. Regulate the more or little light that enters into the eyeExplanation
The function of the pupil is to regulate the amount of light that enters the eye. It does this by adjusting its size in response to the brightness of the environment. In bright conditions, the pupil constricts or becomes smaller to limit the amount of light entering the eye. In dim conditions, the pupil dilates or becomes larger to allow more light to enter the eye. This regulation helps to protect the sensitive structures within the eye and ensures that the appropriate amount of light reaches the retina for clear vision.Rate this question:
-
- 3.
To be able to see normal anymore, a myope can be helped by using glasses of.......
- A.
Positive lens
- B.
Convex lens
- C.
Concave or negative lens
- D.
Double lens
Correct Answer
C. Concave or negative lensExplanation
A myope, or a person with nearsightedness, has difficulty seeing objects clearly at a distance. To correct this, a concave or negative lens is used. This type of lens diverges the incoming light rays before they reach the eye, allowing the myope to focus the light properly on the retina. The concave lens helps to correct the refractive error and allows the myope to see objects clearly at a distance.Rate this question:
-
- 4.
Why cannot people who suffer from astigmatism clearly see vertical and horizontal lines simultaneously?
- A.
Because the eye lens cannot made thin as it must so the image of object falls in front of the retina
- B.
Because the eye lens cannot be expanded as it must so the image of the object falls behind the retina
- C.
Because the accommodation power of this eye is weaker as the effect of age increase
- D.
Because of curves of the eye cornea of astigmatism sufferer is not perfect anymore
Correct Answer
D. Because of curves of the eye cornea of astigmatism sufferer is not perfect anymoreExplanation
Astigmatism is a refractive error caused by an irregularly shaped cornea or lens in the eye. In a normal eye, the cornea is perfectly curved, allowing light to focus on a single point on the retina, resulting in clear vision. However, in astigmatism, the cornea is not perfectly curved, causing light to focus on multiple points on the retina. This leads to distorted or blurred vision, especially when looking at vertical and horizontal lines simultaneously, as the irregular shape of the cornea affects the way light is focused on the retina.Rate this question:
-
- 5.
Which of the following is not a part of the eye?
- A.
Iris
- B.
Pupil
- C.
Retina
- D.
Maleus
Correct Answer
D. MaleusExplanation
The correct answer is maleus. The maleus is actually a bone located in the middle ear, not a part of the eye. The iris, pupil, and retina are all structures found in the eye. The iris controls the size of the pupil, which regulates the amount of light entering the eye. The retina is the innermost layer of the eye that contains light-sensitive cells, allowing us to perceive images.Rate this question:
-
- 6.
What optical instrument is commonly used by jewelers and watchmakers to magnify small details?
- A.
Telescope
- B.
Microscope
- C.
Magnifying glass
- D.
Periscope
Correct Answer
C. Magnifying glassExplanation
A magnifying glass is a simple optical instrument consisting of a single convex lens. When light passes through the convex lens of a magnifying glass, it undergoes refraction, causing the light rays to converge. This convergence results in the formation of an enlarged, virtual image of the object being observed. By magnifying the size of the image, a magnifying glass makes small details appear larger and more easily discernible.Rate this question:
-
- 7.
Which optical instrument is primarily used to observe distant objects in astronomy?
- A.
Binoculars
- B.
Magnifying glass
- C.
Telescope
- D.
Microscope
Correct Answer
C. TelescopeExplanation
Telescopes are sophisticated optical instruments designed to collect and focus light from distant celestial objects such as stars, planets, and galaxies. Telescopes achieve this by utilizing a combination of lenses or mirrors to gather and magnify light. The primary lens or mirror, known as the objective, captures incoming light and forms an image at the telescope's focal point. The eyepiece then magnifies this image, allowing observers to view distant objects with greater clarity and detail.Rate this question:
-
- 8.
What optical phenomenon causes light to bend as it passes from one medium to another?
- A.
Reflection
- B.
Refraction
- C.
Diffraction
- D.
Absorption
Correct Answer
B. RefractionExplanation
Refraction is an optical phenomenon that occurs when light waves pass from one medium to another, such as from air to water or from air to glass. As light travels through different media, it changes speed and direction due to variations in optical density. This change in speed causes the light rays to bend or refract as they transition between the two mediums. The degree of refraction depends on the angle at which the light enters the second medium and the difference in optical density between the two materials.Rate this question:
-
- 9.
What component of a microscope controls the amount of light passing through the specimen?
- A.
Objective lens
- B.
Eyepiece
- C.
Condenser
- D.
Diaphragm
Correct Answer
C. CondenserExplanation
In a microscope, the condenser is an essential optical component located beneath the stage and above the light source. Its primary function is to collect and focus light onto the specimen being observed. The condenser consists of lenses that converge light rays, forming a concentrated beam that illuminates the specimen. By adjusting the position of the condenser or its aperture, users can control the intensity and angle of the light, optimizing the illumination for different types of specimens and imaging techniques.Rate this question:
-
- 10.
Which optical instrument uses a combination of lenses to produce a virtual image that appears larger than the actual object?
- A.
Telescope
- B.
Magnifying glass
- C.
Microscope
- D.
Periscope
Correct Answer
C. MicroscopeExplanation
A microscope is an optical instrument used to magnify and observe objects that are too small to be seen by the naked eye. Microscopes achieve this by employing a combination of lenses to produce a magnified, virtual image of the specimen under observation. The primary lens, known as the objective, collects and magnifies light waves emitted or reflected by the specimen. This magnified image is then further enlarged by the eyepiece, allowing the observer to see tiny details with clarity and precision.Rate this question:
-
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
May 08, 2024Quiz Edited by
ProProfs Editorial Team
Expert Reviewed by
Matt Balanda -
May 18, 2011Quiz Created by
Yahdibinrus