the height measured vertically above from the point on axis are taken as
Answers
Answer:
Furthermore, if the point is attached to the Earth (e.g., a mountain peak), then altitude (height above sea level) is called elevation. In a two-dimensional Cartesian space, height is measured along the vertical axis (y) between a specific point and another that does not have the same y-value.
Explanation:
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Answer:
If the point is attached to the Earth (e.g., a mountain peak), then altitude (height above sea level) is called elevation. In a two-dimensional Cartesian space, height is measured along the vertical axis (y) between a specific point and another that does not have the same y-value.0
Explanation:
New Cartesian sign convention for refraction of light through spherical lenses.
According to this sign convention:
- All distances are measured from the optical centre of the lens.
- The distances measured in the same direction as the incident light are taken positive.
- The distances measured in the direction opposite to the direction of incident light are taken negative.
- Heights measured upwards and perpendicular to the principal axis are taken positive.
- Heights measured downwards and perpendicular to the principal axis are taken negative.
Consequences of new Cartesian sign convention:
- The focal length of a convex lens is positive and that of a concave lens is negative.
- Object distance u is always negative.
- The distance of real image is positive and that of virtual image is negative.
- The object height h is always positive. Height h' of virtual erect image is positive and that of real inverted image is negative.
- The linear magnification, m = h'/h is positive for a virtual image and negative for a real image.
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