(b) Give the angle of incidence and reflection for normal incidence.
18. A candle is kept in front of plane mirror at distance of 15 cm. What is distance between
candle & its image?
16. Radius of curvature of a mirror is +24cm. Name the kind of mirror and give the
characteristics of the image formed by it.
17. Define refraction.
18. State the laws of refraction.
19. How does the lateral displacement depend upon:- (a) Thickness of the glass slab. (b) Angle
of incidence
20. What is the lateral displacement when a ray of light falls normally on a glass slab?
21. Refractive index of water with respect to air is 1.33, what is refractive index of air with
respect to water?
12. Under what condition, the angle of refraction will be equal to the angle of incidence?
3. Refractive index of glass is 1.65, what is the speed of light in glass?
4. If refractive indices of alcohol & water are 1.36 and 1.33 respectively, which of the two is
optically denser?
Answers
Answer:
1. answer for question number B is is 90 degree because if there would be normal then it would be at 90 degree and if it would be at 90 degree then the angle of incidence and angle of refraction would be equal and will retraces its path. 2. the answer to question number 18th will be if the candle is kept in the front of a plane mirror and is a distance of 15 cm from the mirror then it will form on the next side of the mirror at a distance of 15 CM 3. in the radius of the curvature of the mirror is is + 24 cm then the kind of mirror it will be is a convex mirror because the convex mirror has a positive focus and a positive focus will always contain a positive radius of curvature the characteristic of the image formed by it would be if positive radius of curvature is given then then it would be real and inverted 4. refraction is the change in speed of light due to the change in medium if medium one is rare and medium to is denser than the light will bend towards the normal basically if light moves from there to denser than it moves towards in normal and vice versa. 5. the laws of reflection are the ratio of sine of angle of incidence to the Sine of angle of reflection is constant for a light of a given colour and is given pair media this is known as snell's law of reflection if if the angle of incidence and angle of reflection then sin a bus and Saina is constant and next the incident ray the reflected ray and the normal at the point of incidence all lie in the same plane. 6. its formula is D is equals to 2 Sin A minus r y cos r you can clearly hope it may help you I have answered most of them plea mark it as the brainliest
Explanation:thhhe lateral displacement of the rays for the perpendicular hohodistance between the in between the incident at the emergent ray that angle abc = to Lambda division in the first reflection in triangle abc sign Lambda equals to A B boy ab equals to AC in Lambda now Lambda equals to a minus r a b = 2 Sin A minus in triangle abc A cos theta equals to see you bye no 1 equals to see you because I put second and first equation we have a = 20 into Sinai Manasa because it's your equals to T = thickness of the glass slab ab equals to 2 Sin A minus Cos 8 equals to 2 Sin minus eye by cosr
Answer:
1. answer for question number B is is 90 degree because if there would be normal then it would be at 90 degree and if it would be at 90 degree then the angle of incidence and angle of refraction would be equal and will retraces its path. 2. the answer to question number 18th will be if the candle is kept in the front of a plane mirror and is a distance of 15 cm from the mirror then it will form on the next side of the mirror at a distance of 15 CM 3. in the radius of the curvature of the mirror is is + 24 cm then the kind of mirror it will be is a convex mirror because the convex mirror has a positive focus and a positive focus will always contain a positive radius of curvature the characteristic of the image formed by it would be if positive radius of curvature is given then then it would be real and inverted 4. refraction is the change in speed of light due to the change in medium if medium one is rare and medium to is denser than the light will bend towards the normal basically if light moves from there to denser than it moves towards in normal and vice versa. 5. the laws of reflection are the ratio of sine of angle of incidence to the Sine of angle of reflection is constant for a light of a given colour and is given pair media this is known as snell's law of reflection if if the angle of incidence and angle of reflection then sin a bus and Saina is constant and next the incident ray the reflected ray and the normal at the point of incidence all lie in the same plane. 6. its formula is D is equals to 2 Sin A minus r y cos r you can clearly hope it may help you I have answered most of them plea mark it as the brainliest
Explanation: