Light Blog 4

Hello Learner,

This is link for Google Assessment sheet. It will be active for 20 minute only. 
Fill in the details asked in the sheet.

There are MCQ's of chapter Cell- Structure and Function

Link https://forms.gle/C3ECzxrfNBscUyVRA

After, completing the assessment, engage yourself in completing the question given in the blog.

We have been learning the Chapter Light for last three days. Utilize this period in completing the previous work done.

Also check yourself, by doing these questions.

(A) Multiple Choice Question

1. The light coming from the sun gets reflected from the surface of the earth is called ______.

(i)  Earth Light          (ii) Moon Light          (iii) Sun Light             (iv) Space Light

2. The bouncing of light after striking the surface is called as ________.

(i) Dispersion           (ii) Spectrum         (iii) Reflection               (iv) Refraction

3. The ______ layer acts as the reflecting surface, in a mirror.

(i) Iron                (ii) Silver                (iii) Mercury                     (iv) Sodium

4. According to law of reflection, the relation between angle of incidence and angle of reflection is given as:

(i) ∠i=∠r              (ii) ∠i > ∠r                 (iii) ∠i < ∠r                 (iv) ∠i ≠ ∠r

5. A toy is placed at 10 cm in front of a plane mirror. What is the distance of image from the mirror?

(i) 20 cm       (ii) 40 cm          (iii) 10 cm                     (iv) 30 cm

6. A candle is 30 cm high. What is the height of its image in a plane mirror?

(i) 10 cm            (ii) 15 cm             (iii) 30 cm          (iv) 45 cm

7. Angle of incidence is 15o , then what is the angle of reflection?

(i) 15o                     (ii) 30o                          (iii) 45o                 (iv) 60o

8. We can see a non-lumnious object when light:
(i) emitted by the object falls on the eyes.
(ii) is reflected from the object towards our eye.
(iii) completely passes through the object.
(iv) gets completely absorbed by the object.

9. The perpendicular drawn to the reflecting surface is called
(i) normal
(ii) incident ray
(iii) reflected ray
(iv) none of these

10. Two mirrors A and B are placed at right angle to each other. A ray of light incident on mirror A at an angle of 25° falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be 

(i) 25°
(ii) 50°
(iii) 65°
(iv) 115°

(B) Scientific Terms

1. Real Image
2. Virtual Image
3. Reflection of Light
4.Incident Ray
5. Reflected Ray
6. Laws of Reflection


(C) ASSET Questions

1. Light is falling on surface S1, S2, S3 as shown in figure 

Surface/s on which the angle of incidence is equal to the angle of reflection are
(i) S1 only
(ii) S1 and S2 only
(iii) S2 and S3 only
(iv) all the three surfaces

2. Name the phenomenon shown in the figure.

Answer Keys

(A) Multiple choice questions

1. (i) ,  2.(iii),  3.(ii), 4.(i) , 5 (iii), 6.(iii), 7.(i) , 8.( ii), 9.(i), 10.(iii) 

(C) Asset Questions

1. (i)           2. Lateral Inversion