Question

1.Tick the correct answer.

a.We are able to see various objects around us due to

i. refraction
ii. regular reflection
iii. diffused reflection
iv. both regular and diffused reflection

b. Objects that allow light to pass through them are called

i. transparent
ii. translucent
iii. opaque

2. What are the different characteristics of light? What is the speed

of light?

3. What is the composition of sunlight?

4. State the laws of reflection with the help of a diagram.

5. What type of surface would be good reflector of light?

6. How are irregular reflection formed? Give an example.

7. Give two uses of concave and convex mirrors.

8. Explain the following terms with the help of a diagram.
a. Centre of curvature
b. Focus
c. Focal Length
d. Vertex
e. Principal axis

9. Find out and write any two ways in which infrared rays are useful to human beings.

10. Why does a stick inserted in a bucket of water appear bent?

11. State the difference between the converging and diverging beams of light.

12.The angle of incidence of a light ray when it strikes the surface of a plane mirror is 30°. Find the angle of reflection.

PLEASE ANSWER THESE QUESTIONS,I WILL MARK YOU AS BRAINILIST. PLEASE ANSWER CORRECTLY OTHERWISE I WILL REPORT THE ANSWER ​

Answer 1

Answer:

1 a.regular reflection

Answer 2

a) regular reflection

b) transparent

c) 3× 10 8 m/s