Concave Mirror for Dental Examinations
Dentists use a specific type of mirror to view enlarged images of patients' teeth. This allows for detailed examination of small areas of the mouth.
Why Dentists Use Concave Mirrors
A concave mirror is chosen for dental work because it can produce a magnified, virtual, and erect image when an object (like a tooth) is placed within its focal length (i.e., very close to the mirror surface).
- Magnification: The primary reason is to get a larger view of the teeth than the naked eye can see.
- Image Type: The image formed is virtual and erect, making it easy for the dentist to interpret.
Mirror Type Analysis
Let's consider the options:
- Convex Mirror: Always produces a diminished (smaller), virtual, and erect image. This is unsuitable for seeing enlarged details.
- Concave Mirror: Can produce magnified, virtual, and erect images when the object is close. This is ideal for dentists.
- Spherical Mirror: This is a general category that includes both concave and convex mirrors. While technically correct that a concave mirror is a spherical mirror, it's not specific enough.
- Spherical and Convex Mirror: This combination does not describe the specific tool used.
Therefore, the concave mirror is the correct choice due to its ability to provide a magnified view required for dental examinations.
Similar Questions
- The ability of a medium to refract light is also expressed in terms of its:
- The center of the reflecting surface of a spherical mirror is a point called:
- The lens which is thin in the middle and thick at its periphery is called a:
- Which colour deviates the least when light passes through a prism?
- Shadows are formed when _____ objects come in the path of light.
- The blue colour of the sky is due to the:
- If a lens has a focal length of $25\text{ cm}$, what will be the power of that lens?
- Which kind of mirrors is used as rear view wing mirrors in vehicles?
- For a person with Hypermetropia or far-sightedness, the near point, is _____ farther away from the normal near point.
- Hypermetropia can be corrected by using:
Important Questions from Optics
Who was the first one to use a glass prism to obtain the spectrum of sunlight?
Twinkling of stars is due to:
In which a convex mirror is used?
A. Rear View mirrors in vehicles
B. Glass windows
C. Makeup Mirror
D. Kaleidoscope
An object is placed 10 cm in front of a lens. The image formed is real, inverted and of same size as the object. What is the focal length and nature of the lens?
The power of a lens is -2.5 D. The type of lens and its focal length are respectively:
