Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

when refraction does not cause when incident ray is normal to a interface
Asked by firdoustantray98 | 02 Mar, 2021, 06:52: PM
answered-by-expert Expert Answer
Cause of refraction is explained by considering light as plane wave. When a wave starts from source it is spherical in shape .
After travelling long distance , if we consider part of spherical wave, it becomes plane wave.
 
When plane wave makes oblique incidence as shown in left side figure all parts of wavel front are not moving in same medium.
As shown in figure,  point A of wavefront reaches refracting medium earlier than point B . Hence point A will move in
refracting medium with slow speed , whereas point B will move faster from B to D .
This makes the wavefront to turn and refraction takes place.
 
In normal incidence ,  as shown in right side figure , all parts of wavefront reaches the refracting medium simultaneously.
Hence all parts of wavefront has same speed at any instant in refracting medium .
Hence there is no turning effect and hence no deviation or refraction
Answered by Thiyagarajan K | 02 Mar, 2021, 09:52: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
CBSE 10 - Physics
What are the values of the angle of incidence, and the angle of reflection for normal incidence on the plane mirror surface?
Asked by anuskakuhu | 21 Mar, 2023, 11:50: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
What is reflection
Asked by vpitliya42 | 21 Nov, 2022, 01:21: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
In recent days what alternative we used for silvering of mirror?
Asked by priyankakiran2017 | 21 Jun, 2022, 08:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
what is the cause of reflection of light
Asked by aarjugodara2 | 18 Jun, 2022, 04:36: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
we are unable to see our image in a plane mirror from every angle but we can see a chair in a room anywhere. Why?
Asked by priyankakiran2017 | 15 Jun, 2022, 03:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
light is traveling in straight line?
Asked by officialnishantyadavji | 13 Jun, 2022, 01:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
reflection of light
Asked by madhvyerge | 10 Aug, 2021, 03:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
A boy holding a plane mirror walks in reverse direction with speed of 0.5 m/s. He is able to see the image of scooter in the mirror which is standing at rest behind him. What is the speed at which the image of scooter approaches the boy?
Asked by Trisha Gupta | 03 Aug, 2021, 03:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
90 = (360/3) -1
Asked by anusuyasoni0212 | 09 Jul, 2021, 05:08: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
What is the definition of light
Asked by singhnathawat6 | 25 May, 2021, 11:39: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt