State the laws of reflection.
Solution and Explanation
Laws of reflection:
- The angle of incidence is always equal to the angle of reflection.
- The incident ray, the reflected ray and the normal to the surface at the point of incidence lie in the same plane.
Top Questions on Multiple Images
- How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?
- CBSE Class VIII
- Science
- Multiple Images
- Boojho stands at A just on the side of a plane mirror as shown in Fig.
Can he see himself in the mirror? Also, can he see the image of objects situated at P, Q and R?- CBSE Class VIII
- Science
- Multiple Images
(a) Find out the position of the image of an object situated at A in the plane mirror.
(b) Can Paheli at B see this image?
(c) Can Boojho at C see this image?
(d) When Paheli moves from B to C, where does the image of A move?- CBSE Class VIII
- Science
- Multiple Images
- Two mirrors meet at right angles. A ray of light is incident on one at an angle of 30° as shown in Fig.
Draw the reflected ray from the second mirror.- CBSE Class VIII
- Science
- Multiple Images
- Choose the correct option.
Image formed by a plane mirror is- CBSE Class VIII
- Science
- Multiple Images
Questions Asked in CBSE Class VIII exam
Underline the verbs and arrange them in two columns, Past and Earlier past.
(a) My friends set out to see the caves in the next town, but I stayed at home, because I had seen them already.
(b) When they arrived at the station, their train had left. They came back home, but by that time I had gone out to see a movie!
(c) So they sat outside and ate the lunch I had packed for them.
(d) By the time I returned, they had fallen asleep!
Past Earlier Past - CBSE Class VIII
- The Best Christmas Present in the world
- Subtract 4p2q – 3pq + 5pq2 – 8p + 7q – 10 from 18 – 3p – 11q + 5pq – 2pq2 + 5p2q
- CBSE Class VIII
- Addition and Subtraction of Algebraic Expressions
Fill in the blanks using the correct form of the verbs in brackets.
My little sister is very naughty. When she ____ (come) back from school yesterday, she had _____(tear) her dress. We _____(ask) her how it had _____(happen). She ______(say) she _____ _____ (have, quarrel) with a boy. She _____ _____ (have, beat) him in a race and he _____ ____ (have, try) to push her. She _____ ____ (have, tell) the teacher and so he _____ _____ (have, chase) her, and she _____ _____ (have, fall) down and _____ _____ (have, tear) her dress.
- CBSE Class VIII
- The Best Christmas Present in the world
- Match the organisms in Column A with their action in Column B.
A
B
(i) Bacteria (a) Fixing nitrogen (ii) Rhizobium (b) Setting of curd (iii) Lactobacillus (c) Baking of bread (iv) Yeast (d) Causing malaria (v) A protozoan (e) Causing cholera (vi) A virus (f) Causing AIDS (g) Producing antibodies - CBSE Class VIII
- Microorganisms
Say whether the following are true or false.
1. Ignesious lost his wife, two children, his father-in-law, and his brother-in-law in the tsunami.
2. Sanjeev made it to safety after the tsunami.
3. Meghna was saved by a relief helicopter.
4. Almas’s father realised that a tsunami was going to hit the island.
5. Her mother and aunts were washed away with the tree that they were holding on to.
- CBSE Class VIII
- The Tsunami
Concepts Used:
Reflection of Light
Reflection of light is the process by which light waves bounce off a surface when they encounter it. It is a fundamental phenomenon that plays a crucial role in our everyday experiences with light and vision.
When light waves strike a surface, three possible outcomes can occur: absorption, transmission, or reflection. In the case of reflection, the light waves are neither absorbed nor transmitted but instead are redirected back into the original medium.
The angle of incidence, which is the angle between the incident light ray and the perpendicular to the surface, is equal to the angle of reflection, which is the angle between the reflected light ray and the perpendicular to the surface. This relationship is described by the law of reflection.
The law of reflection states that the incident ray, the reflected ray, and the normal (perpendicular) to the surface at the point of incidence lie on the same plane. Additionally, the angle of incidence is equal to the angle of reflection.
The reflective properties of a surface depend on its smoothness and nature. A smooth, polished surface, such as a mirror, exhibits regular or specular reflection, where light waves are reflected in a well-defined direction, resulting in a clear image. On the other hand, a rough or uneven surface exhibits diffuse reflection, where light waves are scattered in various directions, leading to a blurred or scattered reflection.
The reflection of light is utilized in numerous practical applications. Mirrors are used for reflection in optics, photography, and everyday objects like mirrors in households and vehicles. Reflective surfaces are employed in optical systems, such as telescopes, microscopes, and laser devices. The understanding of light reflection is also vital in architectural design, where the reflection of natural light is harnessed to enhance lighting and energy efficiency in buildings.
Overall, the reflection of light is a fundamental phenomenon that enables us to perceive the world around us, and its principles find application in various scientific, technological, and practical domains.