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प्रश्न
The sun is seen before the sunrise and after the sunset.
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उत्तर
EARLY SUNRISE and SUNSET: At sun Rise: When the Sun is just below the horizon, the light from the Sun suffers refraction from RARE to DENSER medium (As the atmosphere is warmer than layers near the earth at that time) bends towards the normal at each refraction. Due to continuous bending of light rays, the Sun can be seen even when its actual position is just below the Horizon. As a result, the Sun is seen in advance, two minutes before it rises above the horizon in the morning.
Similarly, in the evening Sun is seen delayed by 2 minutes longer above the horizon after the Sunset.
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संबंधित प्रश्न
If a spherical mirror breaks, what type of mirrors are the individual pieces?
In each case (a) and (b), draw reflected rays for the given incident rays and mark focus by the symbol F.
The diagram below in Figure, shows a convex mirror. C is its centre of curvature and F is its focus. (i) Draw two rays from A and hence locate the position of image of object OA. Label the image IB. (ii) State three characteristics of the image.
Name the mirror which always produces an erect and virtual image. How is the size of image related to the size of object?
How is the focal length of a spherical mirror related to its radius of curvature?
The focal length of a concave mirror is 10 cm. Find its radius of curvature.
An object of height 2 cm is placed at a distance of 20 cm in front of a concave mirror of a focal length of 12 cm. Find the position, size, and nature of the image.
The boxes in figure (a, b, c) represent mirrors; insert a mirror which will reflect the incident ray as shown in the diagram.
An object is placed at a distance of 0.25 m
in front of a plane mirror. The distance between the object and image will be ______.
