Question

What is a pinhole camera?

Describe annular solar eclipse?

What is rectilinear propagation of light?

What are the characteristics of shadows?

What are conditions required for the formation of shadows?​

Answer 1

Answer:

1A pinhole camera is a simple camera, without lens, in the shape of a box. One of the sides has a small hole and it produces an inverted image of the outside world at other side.2.An annular solar eclipse happens when the Moon covers the Sun's center, leaving the Sun's visible outer edges to form a “ring of fire” or annulus around the Moon.3. Rectilinear propagation of light refers to the propensity of light to travel along a straight line without any interference in its trajectory. When light travels through a medium, say air or water, it follows a straight line.4. It is always either large or same size as that of the object.

It always black in colour.

Its position changes depending upon the position of source of light.

it needs a screen for being formed. 5. The following three things are required for a shadow to form: a source of light. an opaque object. a screen or surface behind the object.

Explanation:

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