Question

Define
a)ray of light
b) beam of light
c) rectilinear propagation of light
d) shadow

Answer 1

Answer:

c.Rectilinear propagation of light: Light travels in a straight line between any two points

a.The light traveling in any one direction in a straight line is called a ray of light

b.A light beam or beam of light is a directional projection of light energy radiating from a light source

d .dark shape on a surface that is caused by something being between the light and that surface.

Explanation:

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Answer 2

Answer:

a. The light traveling in any one direction in a straight line is called a ray of light. A group of light rays given out from a source is called a beam of light.

b. Ray of Light : A light ray is a line (straight or curved) that is perpendicular to the light's wave fronts; its tangent is collinear with the wave vector.

c. 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.  Another example of rectilinear propagation of light involves the formation of shadows.

d. Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object. The dark area is called a shadow.

Explanation: