The mirror used by a dentist to examine the teeth of a person is

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The mirror used by a dentist to examine the teeth of a person is a concave mirror. Concave mirrors are curved mirrors that bulge inward. They are used in a variety of applications, including as part of some optical instruments, such as telescopes and cameras, and in some lighting systems, such as car headlights.

When light strikes a concave mirror, it is reflected inward and focuses to a point, creating an image. The size and position of the image depends on the curvature of the mirror and the distance of the object from it. The properties of a concave mirror are:

It forms a virtual, erect, and diminished image for objects placed at a distance greater than its focal length
The image is always smaller than the object
The size of the image is directly proportional to the object's distance
The image is always located between the focus and the mirror.
Concave mirrors are used for applications such as shaving, dental exams, and in reflector telescopes to gather light and form an image.

Concave Mirror Used by Dentists

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CBSE CLASS XII Related Questions

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Consider the nuclear reaction $ X \to Y + Z $. Let $ M_x $, $ M_y $, and $ M_z $ be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

$ (M_x - M_z)<M_y $
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$ M_x<(M_y + M_z) $

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A charged particle $+q$ in an electric field $\vec{E}$ experiences a force in the direction of the electric field. As a result, its kinetic energy changes. Similarly, the charged particle also experiences a force when it moves in a magnetic field $\vec{B}$. But this magnetic force is perpendicular to both velocity $\vec{v}$ of the charged particle and the magnetic field $\vec{B}$, so it cannot change the kinetic energy of the charged particle. Consider two charged particles 1 and 2 of masses $m$ and $\frac{m}{2}$ having charges $-q$ and $+2q$ respectively. They are accelerated from rest through the same potential difference $V$ and acquire kinetic energy $K_1$ and $K_2$. Then they enter in a region of uniform magnetic field $\vec{B}$ perpendicular to their velocities.

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With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

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An electric field $\vec{E}$ is established across the ends of a cylindrical conductor of length L and area of cross-section A. Discuss how electrons attain an average velocity, independent of time. Hence, obtain a relation between current in the conductor and this ‘average velocity’ of electrons.

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A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

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Two air-filled capacitors of capacitances $C_1$ and $C_2$ are connected in parallel with a dc battery. After the capacitors are fully charged, a slab of dielectric constant K is inserted between the plates of each capacitor. How will the (i) charge on each capacitor and (ii) energy stored in the capacitor affected after the slab is introduced.

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The mirror used by a dentist to examine the teeth of a person is:

CBSE CLASS XII Related Questions

1.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

3.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

5.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

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The mirror used by a dentist to examine the teeth of a person is:

CBSE CLASS XII Related Questions

1.Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

3.With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

5.A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

3.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

5.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.