Physics
Show that for a material with refractive index μ ≥ 2–√, light incident at any angle shall be guided along a length perpendicular to the incident face.
19
Nov
Show that for a material with refractive index μ ≥ 2–√, light incident at any angle shall be guided along a length perpendicular to the incident face. light incident at any angle shall be guided along a length perpendicular to the incident face. Show that for a material with refractive index μ ≥ 2–√ November [...]
A myopic adult has a far point at 0.1m. His power of accomodation is 4 diopters. (i) What power lenses are required to see distant objects ? (ii) What is his near point without glasses ? (iii) What is his near point with glasses ? (Take the image distance from the lens of the eye to the retina to be 2 cm).
19
Nov
A myopic adult has a far point at 0.1m. His power of accomodation is 4 diopters. (i) What power lenses are required to see distant objects ? (ii) What is his near point without glasses ? (iii) What is his near point with glasses ? (Take the image distance from the lens of the eye [...]
The phenomena involved in the reflection of radiowaves by ionosphere is similar to
19
Nov
The phenomena involved in the reflection of radiowaves by ionosphere is similar to The phenomena involved in the reflection of radiowaves by ionosphere is similar to November 19, 2020 Category: Chapter 9 - Ray Optics and Optical Instruments , NCERT Exemplar Class 12 , Physics ,
A jar of height h is filled with a transparent liquid of refractive index μ, Fig. At the centre of the jar on the bottom surface is a dot. Find the minimum diameter of a disc, such that when placed on the top surface symmetrically about the centre, the dot is invisible.
19
Nov
A jar of height h is filled with a transparent liquid of refractive index μ, Fig. At the centre of the jar on the bottom surface is a dot. Find the minimum diameter of a disc, such that when placed on the top surface symmetrically about the centre, the dot is invisible. A jar of [...]
The radius of curvature of the curved surface of a plano-convex lens is 20 cm. If the refractive index of the material of the lens be 1.5, it will
19
Nov
The radius of curvature of the curved surface of a plano-convex lens is 20 cm. If the refractive index of the material of the lens be 1.5, it will it will The radius of curvature of the curved surface of a plano-convex lens is 20 cm. If the refractive index of the material of the [...]
A thin convex lens of focal length 25 cm is cut into two pieces 0.5 cm above the principal axis. The top part is placed at (0.0) and an object placed at (−50cm,0). Find the coordinates of the image.
19
Nov
A thin convex lens of focal length 25 cm is cut into two pieces 0.5 cm above the principal axis. The top part is placed at (0.0) and an object placed at (−50cm,0). Find the coordinates of the image. 0). Find the coordinates of the image. A thin convex lens of focal length 25 cm [...]
A circular disc of radius ‘R’ is placed co-axially and horizontally inside and opaque hemispherical bowl of radius ‘a’, Fig. The far edge of the disc is just visible when viewed from the edge of the bowl. The bowl is filled with transparent liquid of refractive index μ and the near edge of the disc becomes just visible. How far below the top of the bowl is the disc placed ?
19
Nov
A circular disc of radius ‘R’ is placed co-axially and horizontally inside and opaque hemispherical bowl of radius ‘a’, Fig. The far edge of the disc is just visible when viewed from the edge of the bowl. The bowl is filled with transparent liquid of refractive index μ and the near edge of the disc [...]
A short object of length L is placed along the principal axis of a concave mirror away from focus. The object distance is u. If the mirror has a focal length f, what will be the length of the image ? You may take L
19
Nov
A short object of length L is placed along the principal axis of a concave mirror away from focus. The object distance is u. If the mirror has a focal length f, what will be the length of the image ? You may take L A short object of length L is placed along the [...]
An object approaches a convergent lens from the left of the lens with a uniform speed 5m/s and stops at the focus. The image
19
Nov
An object approaches a convergent lens from the left of the lens with a uniform speed 5m/s and stops at the focus. The image An object approaches a convergent lens from the left of the lens with a uniform speed 5m/s and stops at the focus. The image November 19, 2020 Category: Chapter 9 - [...]
An unsymmetrical double convex thin lens forms the image of a point object on its axis. Will the position of the image change if the lens is reversed ?
19
Nov
An unsymmetrical double convex thin lens forms the image of a point object on its axis. Will the position of the image change if the lens is reversed ? An unsymmetrical double convex thin lens forms the image of a point object on its axis. Will the position of the image change if the lens [...]