What is rectilinear propagation of light? Explain ray of light and beam of light.
(N/A) The wavelength of light is very small compared to the size of ordinary objects. Due to this,light travels from one point to another along a straight line path. This phenomenon is known as the rectilinear propagation of light.
$A$ ray of light is defined as a line representing the path along which light energy travels. It is represented by a straight line with an arrowhead indicating the direction of propagation.
$A$ beam of light is a bundle or collection of a large number of light rays traveling together in a particular direction.
$A$ ray of light is defined as a line representing the path along which light energy travels. It is represented by a straight line with an arrowhead indicating the direction of propagation.
$A$ beam of light is a bundle or collection of a large number of light rays traveling together in a particular direction.
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Similar Questions
$A$ wire is bent in the shape of a right-angled triangle and is placed in front of a concave mirror of focal length $f$,as shown in the figure. Which of the figures shown in the four options qualitatively represent$(s)$ the shape of the image of the bent wire? (These figures are not to scale.)
$A$ point source of light moves in a straight line parallel to a plane table. Consider a small portion of the table directly below the line of movement of the source. The illuminance $E$ at this portion varies with its distance $r$ from the source as:
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View SolutionThe inverse square law for illuminance is valid for:
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View SolutionIf the focal length of the objective lens is increased,then the magnifying power of:
$A$ light ray is incident on the surface of a sphere of refractive index $n$ at an angle of incidence $\theta_0$. The ray partially refracts into the sphere with angle of refraction $\phi_0$ and then partly reflects from the back surface. The reflected ray then emerges out of the sphere after a partial refraction. The total angle of deviation of the emergent ray with respect to the incident ray is $\alpha$. Match the quantities mentioned in $List-I$ with their values in $List-II$ and choose the correct option.
$List-I$ $List-II$ $(P)$ If $n=2$ and $\alpha=180^{\circ}$,then all the possible values of $\theta_0$ will be $(1)$ $30^{\circ}$ and $0^{\circ}$ $(Q)$ If $n=\sqrt{3}$ and $\alpha=180^{\circ}$,then all the possible values of $\theta_0$ will be $(2)$ $60^{\circ}$ and $0^{\circ}$ $(R)$ If $n=\sqrt{3}$ and $\alpha=180^{\circ}$,then all the possible values of $\phi_0$ will be $(3)$ $45^{\circ}$ and $0^{\circ}$ $(S)$ If $n=\sqrt{2}$ and $\theta_0=45^{\circ}$,then all the possible values of $\alpha$ will be $(4)$ $150^{\circ}$ $(5)$ $0^{\circ}$
| $List-I$ | $List-II$ |
| $(P)$ If $n=2$ and $\alpha=180^{\circ}$,then all the possible values of $\theta_0$ will be | $(1)$ $30^{\circ}$ and $0^{\circ}$ |
| $(Q)$ If $n=\sqrt{3}$ and $\alpha=180^{\circ}$,then all the possible values of $\theta_0$ will be | $(2)$ $60^{\circ}$ and $0^{\circ}$ |
| $(R)$ If $n=\sqrt{3}$ and $\alpha=180^{\circ}$,then all the possible values of $\phi_0$ will be | $(3)$ $45^{\circ}$ and $0^{\circ}$ |
| $(S)$ If $n=\sqrt{2}$ and $\theta_0=45^{\circ}$,then all the possible values of $\alpha$ will be | $(4)$ $150^{\circ}$ |
| $(5)$ $0^{\circ}$ |
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