when refraction does not cause when incident ray is normal to a interface
Asked by firdoustantray98 | 2nd Mar, 2021, 06:52: PM
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 | 2nd Mar, 2021, 09:52: PM
- An object 4 cm in size is placed 25 cm in a front of concave mirror of focal length 15 cm. find nature postion and size of the image draw the ray digram to show the formation of image in this case?
- CAN U SEND ME THE IMPORTANT FORMULAE IN LIGHT REFLECTION AND REFRACTION
- radius of curvature of a concave mirror is twenty five centimeter what is its focal length
- Draw the ray diagram when the object is kept between F1 and 2F1 of the convex lens. with the help of the diagram mention the position and nature of the image formed.
- What is light
- what is light
- A man is 6.0 ft tall, what is the smallest size plane mirror he can use to see his entire image ?
- question no. 15
- laws of reflection
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Verify mobile number
Enter the OTP sent to your number