When an object is placed at the focus of a concave lens, its image is formed on the same side as the object. The image is virtual, erect, and highly diminished, appearing closer to the lens. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
When an object is placed at the focus of a concave lens, its image is formed on the same side as the object. The image is virtual, erect, and highly diminished, appearing closer to the lens.
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.
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.
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.
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.
When a ray of light propagates from a rarer to a denser medium, its frequency remains unchanged. Frequency depends only on the source of light and is unaffected by the medium of propagation. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
When a ray of light propagates from a rarer to a denser medium, its frequency remains unchanged. Frequency depends only on the source of light and is unaffected by the medium of propagation.
The relation between the refractive index (n) and the critical angle (θ c ) for a given pair of optical media is: n = 1/sinθ c ​ where θ c is the angle of incidence for total internal reflection. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
The relation between the refractive index (n) and the critical angle (θ c ) for a given pair of optical media is:
n = 1/sinθ c
​
where θ c is the angle of incidence for total internal reflection.
No, the decrease in speed does not imply a decrease in the energy carried by the light wave. The energy of light depends on its frequency, which remains unchanged when transitioning between media. Only the wavelength and speed are affected, not the energy. For more visit here: https://www.tiwariacadRead more
No, the decrease in speed does not imply a decrease in the energy carried by the light wave. The energy of light depends on its frequency, which remains unchanged when transitioning between media. Only the wavelength and speed are affected, not the energy.
The working of optical fibers is based on the principle of total internal reflection. When light travels through the core of the fiber, it is reflected entirely at the core-cladding interface, allowing efficient transmission over long distances. For more visit here: https://www.tiwariacademy.com/nceRead more
The working of optical fibers is based on the principle of total internal reflection. When light travels through the core of the fiber, it is reflected entirely at the core-cladding interface, allowing efficient transmission over long distances.
Total internal reflection occurs when light travels from a denser medium to a rarer medium at an angle greater than the critical angle. The critical angle depends on the refractive indices of the two media. Additionally, the light must be incident on the boundary from the denser medium. For more visRead more
Total internal reflection occurs when light travels from a denser medium to a rarer medium at an angle greater than the critical angle. The critical angle depends on the refractive indices of the two media. Additionally, the light must be incident on the boundary from the denser medium.
An object is placed at the focus of a concave lens. Where will its image be formed?
When an object is placed at the focus of a concave lens, its image is formed on the same side as the object. The image is virtual, erect, and highly diminished, appearing closer to the lens. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
When an object is placed at the focus of a concave lens, its image is formed on the same side as the object. The image is virtual, erect, and highly diminished, appearing closer to the lens.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
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.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
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.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
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.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
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.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
If a ray of light propagates from a rarer to a denser medium, how does its frequency change?
When a ray of light propagates from a rarer to a denser medium, its frequency remains unchanged. Frequency depends only on the source of light and is unaffected by the medium of propagation. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
When a ray of light propagates from a rarer to a denser medium, its frequency remains unchanged. Frequency depends only on the source of light and is unaffected by the medium of propagation.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
Write the relation between the refractive index and critical angle for a given pair of optical media.
The relation between the refractive index (n) and the critical angle (θ c ) for a given pair of optical media is: n = 1/sinθ c ​ where θ c is the angle of incidence for total internal reflection. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
The relation between the refractive index (n) and the critical angle (θ c ) for a given pair of optical media is:
n = 1/sinθ c
​
where θ c is the angle of incidence for total internal reflection.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
When light travels from a rarer to a denser medium, the speed decreases. Does this decrease in speed imply a decrease in the energy carried by the light wave?
No, the decrease in speed does not imply a decrease in the energy carried by the light wave. The energy of light depends on its frequency, which remains unchanged when transitioning between media. Only the wavelength and speed are affected, not the energy. For more visit here: https://www.tiwariacadRead more
No, the decrease in speed does not imply a decrease in the energy carried by the light wave. The energy of light depends on its frequency, which remains unchanged when transitioning between media. Only the wavelength and speed are affected, not the energy.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
Name the physical principle on which the working of optical fibres is based.
The working of optical fibers is based on the principle of total internal reflection. When light travels through the core of the fiber, it is reflected entirely at the core-cladding interface, allowing efficient transmission over long distances. For more visit here: https://www.tiwariacademy.com/nceRead more
The working of optical fibers is based on the principle of total internal reflection. When light travels through the core of the fiber, it is reflected entirely at the core-cladding interface, allowing efficient transmission over long distances.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/
State the necessary conditions for the phenomenon of total internal reflection to occur.
Total internal reflection occurs when light travels from a denser medium to a rarer medium at an angle greater than the critical angle. The critical angle depends on the refractive indices of the two media. Additionally, the light must be incident on the boundary from the denser medium. For more visRead more
Total internal reflection occurs when light travels from a denser medium to a rarer medium at an angle greater than the critical angle. The critical angle depends on the refractive indices of the two media. Additionally, the light must be incident on the boundary from the denser medium.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/