Difficult
State the laws of refraction. Explain the phenomenon of refraction when a ray of light passes through a rectangular glass slab with the help of a ray diagram.
(N/A) The laws of refraction are as follows:
$1$. The incident ray, the refracted ray, and the normal to the interface of two transparent media at the point of incidence all lie in the same plane.
$2$. Snell's Law: The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for the light of a given color and for a given pair of media, expressed as $\frac{\sin i}{\sin r} = \text{constant} = n_{21}$.
When a light ray passes through a rectangular glass slab:
- The ray enters from air to glass (denser medium) and bends towards the normal.
- It travels through the glass and exits from glass to air (rarer medium), bending away from the normal.
- The emergent ray is parallel to the incident ray but laterally displaced. This perpendicular distance between the original path of the incident ray and the emergent ray is called lateral displacement.
$1$. The incident ray, the refracted ray, and the normal to the interface of two transparent media at the point of incidence all lie in the same plane.
$2$. Snell's Law: The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for the light of a given color and for a given pair of media, expressed as $\frac{\sin i}{\sin r} = \text{constant} = n_{21}$.
When a light ray passes through a rectangular glass slab:
- The ray enters from air to glass (denser medium) and bends towards the normal.
- It travels through the glass and exits from glass to air (rarer medium), bending away from the normal.
- The emergent ray is parallel to the incident ray but laterally displaced. This perpendicular distance between the original path of the incident ray and the emergent ray is called lateral displacement.
Explore More
Similar Questions
How can you identify the three types of mirrors without touching them?
Medium
View Solution$(a)$ Define absolute refractive index.
$(b)$ The path of a light ray from three different media $A, B$ and $C$ for a given angle of incidence is shown below. Study the diagrams and answer the following questions.
$(i)$ Which of the three media $A, B$ or $C$ has maximum optical density?
$(ii)$ Through which of the three media,will the speed of light be maximum?
$(iii)$ Will the light travelling from $A$ to $B$ bend towards or away from the normal?
$(iv)$ Will the refractive index of $B$ relative to $C$ be more than unity or less than unity?
$(b)$ The path of a light ray from three different media $A, B$ and $C$ for a given angle of incidence is shown below. Study the diagrams and answer the following questions.
$(i)$ Which of the three media $A, B$ or $C$ has maximum optical density?
$(ii)$ Through which of the three media,will the speed of light be maximum?
$(iii)$ Will the light travelling from $A$ to $B$ bend towards or away from the normal?
$(iv)$ Will the refractive index of $B$ relative to $C$ be more than unity or less than unity?
Medium
View SolutionIf the absolute refractive indices of water, benzene, and sapphire are $1.33$, $1.50$, and $1.77$ respectively, then which medium has the maximum relative refractive index?
Easy
View SolutionWhat is the type of the final image,as compared to the object,in the compound microscope?
Easy
View SolutionThe magnification of a real image formed by a concave mirror is always ...
Easy
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo