Define a ray and a beam of light.
(N/A) $1$. Ray of Light: $A$ ray of light is defined as the path along which light energy travels. It is represented by a straight line with an arrowhead indicating the direction of propagation.
$2$. Beam of Light: $A$ beam of light is defined as a bundle or collection of a large number of light rays traveling together in a particular direction. Beams can be classified as parallel,convergent,or divergent.
$2$. Beam of Light: $A$ beam of light is defined as a bundle or collection of a large number of light rays traveling together in a particular direction. Beams can be classified as parallel,convergent,or divergent.
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Similar Questions
$A$ ray of light moving along the vector $\vec{v} = -\hat{i} - 2\hat{j}$ undergoes refraction at an interface of two media,which is the $x-z$ plane. The refractive index for $y > 0$ is $\mu_1 = 2$,while for $y < 0$,it is $\mu_2 = \sqrt{5}/2$. Find the unit vector along which the refracted ray moves.
Match List $I$ with List $II$ and select the correct answer using the codes given below the lists:
List $I$ (Position of the object) List $II$ (Magnification) $(I)$ An object is placed at focus before a convex mirror $(A)$ Magnification is $-\infty$ $(II)$ An object is placed at centre of curvature before a concave mirror $(B)$ Magnification is $0.5$ $(III)$ An object is placed at focus before a concave mirror $(C)$ Magnification is $+1$ $(IV)$ An object is placed at centre of curvature before a convex mirror $(D)$ Magnification is $-1$ $(E)$ Magnification is $0.33$
| List $I$ (Position of the object) | List $II$ (Magnification) |
|---|---|
| $(I)$ An object is placed at focus before a convex mirror | $(A)$ Magnification is $-\infty$ |
| $(II)$ An object is placed at centre of curvature before a concave mirror | $(B)$ Magnification is $0.5$ |
| $(III)$ An object is placed at focus before a concave mirror | $(C)$ Magnification is $+1$ |
| $(IV)$ An object is placed at centre of curvature before a convex mirror | $(D)$ Magnification is $-1$ |
| $(E)$ Magnification is $0.33$ |
Difficult
View SolutionIf the luminous efficiency of a lamp is $2 \text{ lumen/watt}$ and its luminous intensity is $42 \text{ candela}$,then the power of the lamp is.......$W$
Medium
View Solution$A$ concave mirror of radius of curvature $h$ is placed at the bottom of a tank containing a liquid of refractive index $\mu$ up to a depth $d$. An object $P$ is placed at a height $h$ above the bottom of the mirror. Outside the liquid,an observer $O$ views the object and its image in the mirror. The apparent distance between these two will be
Medium
View Solution$A$ 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.)
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