Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
1.0k views
in Light by (47.5k points)
closed by

What do you understand by refraction? Write the laws of refraction. Explain refraction through a glass slab.

1 Answer

+1 vote
by (46.0k points)
selected by
 
Best answer

When a ray of light travels from one medium to another medium there is a deviation in its path. This phenomenon is called refraction of light. 

Following are the laws of refraction:

  • When a ray of light travels from a rarer medium to a denser medium, it bends towards the normal.
  • When a ray of light travels from a denser medium to a rarer medium, it bends away from the normal.
  • Ratio of sin of angle of incident to sin of angle reflection is constant for a given pair of media. This is called Snell’s law.

Refraction though glass slab can be explained by the following activity:

  • Fix a sheet of white paper on a drawing board using drawing pins.
  • Place a rectangular glass slab over the sheet in the middle.
  •  Draw the outline of the slab with a pencil. Let us name the outline as ABCD.
  • Take four identical pins.
  •  Fix two pins, E and F vertically such that the line joining the pins is inclined to the edge AB.
  •  Look for the images of the pins E and F through the opposite edge. Fix two pins, say G and H, such that these pins and the images of E and F lie on a straight line.
  • Remove the pins and the slab.
  • Join the positions of tip of the pins E and F and produce the line up to AB. Let EF meet AB at O. Similarly, join the positions of tip of the pins G and H and produce it up to the edge CD. Let HG meet CD at O’.
  •  Join O and O’. Also produce EF up to P, as shown by a dotted line.

Related questions

0 votes
1 answer
asked May 16, 2020 in Light by Chahal (40.4k points)
0 votes
1 answer
0 votes
1 answer

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...