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Define refractive index of a transparent medium?
The refractive index of a transparent medium is the ratio of the speed of light in a vacuum (c) to the speed of light in the medium (v): n = c/v . It indicates optical density. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
The refractive index of a transparent medium is the ratio of the speed of light in a vacuum (c) to the speed of light in the medium (v):
n = c/v .
It indicates optical density.
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When an object is placed between f and 2f of a concave mirror, would the image formed be (i) real or virtual, and (ii) diminished or magnified?
When an object is placed between f (focus) and 2f of a concave mirror: (i) The image formed is real. (ii) The image is magnified and inverted, forming beyond 2f. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
When an object is placed between f (focus) and 2f of a concave mirror:
(i) The image formed is real.
(ii) The image is magnified and inverted, forming beyond 2f.
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For the same angle of incidence, the angles of refraction in three different media A, B and C are 15°, 25° and 35°, respectively. In which medium will the velocity of light be minimum?
The velocity of light is minimum in medium A, as it has the smallest angle of refraction (15°), indicating the highest refractive index. Higher refractive index corresponds to lower light velocity in the medium. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapRead more
The velocity of light is minimum in medium A, as it has the smallest angle of refraction (15°), indicating the highest refractive index. Higher refractive index corresponds to lower light velocity in the medium.
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Do the frequency and wavelength change when light passes from a rarer to a denser medium?
When light passes from a rarer to a denser medium, its wavelength decreases, but the frequency remains unchanged. The speed reduction in the denser medium causes a shorter wavelength while maintaining the same frequency. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/phyRead more
When light passes from a rarer to a denser medium, its wavelength decreases, but the frequency remains unchanged. The speed reduction in the denser medium causes a shorter wavelength while maintaining the same frequency.
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A solid cylinder is rolling down a rough inclined plane of inclination θ. Then
The interaction between the cylinder and the surface would determine its motion when a solid cylinder rolls down a rough inclined plane. Inclined plane means that it is at an angle, causing the cylinder to experience gravitational force acting downward. The gravitational force can be divided into twRead more
The interaction between the cylinder and the surface would determine its motion when a solid cylinder rolls down a rough inclined plane. Inclined plane means that it is at an angle, causing the cylinder to experience gravitational force acting downward. The gravitational force can be divided into two: one parallel to the incline, which will push the cylinder down, and the other perpendicular to the incline, which will push the cylinder against the surface.
It therefore requires friction forces. The force of friction happens at the contact point between the cylinder and the incline where it prevents slippage. That torque is precisely what makes rolling possible as it moves down a slope. However, this movement happens in the direction that allows it to contribute to the roll.
However, this friction force also acts as a hindrance. It counteracts the motion caused by the gravitational component along the incline, which essentially prevents the translational movement of the cylinder. Thus, even though friction is facilitating rotation, it simultaneously hinders the acceleration of the center of mass of the cylinder down the incline, thus maintaining the balance between the rotational and translational dynamics.
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