Light Mirrors and Lenses Class 8 Fill in the Blanks
hardLight Mirrors and Lenses Class 8 Fill in the Blanks
Light Mirrors and Lenses Class 8 Fill in the Blanks
Question 1.
A ............ mirror has a reflecting surface that curves inward and can form real images when the object is placed within its focal length.
Answer:
concave
Question 2.
The angle of incidence is defined as the angle between the incident ray and the........... drawn perpendicular to the surface at the point of incidence.
Answer:
norma
Question 3.
Convex mirrors are commonly used in vehicles as side-view mirrors because they provide a ............ view area than plane mirrors.
Answer:
larger
Question 4.
When light passes from air into water, it bends due to a change in ............ , which causes objects viewed through the water to appear distorted.
Answer:
speed
Question 5.
The law of reflection states that the angle of incidence is always equal to the angle of .............
Answer:
reflection.
Light Mirrors and Lenses Class 8 True or False
Question 1.
A concave mirror always forms an erect image when the object is placed at a distance greater than its focal point.
Answer:
False
Question 2.
Convex lenses are used to magnify objects.
Answer:
True
Question 3.
The angle of incidence is always equal to the angle of reflection when light reflects off a plane mirror.
Answer:
True
Question 4.
Convex mirrors provide a wider field of view compared to plane mirrors.
Answer:
True
Question 5.
A concave lens can produce a real image.
Answer:
False
Light Mirrors and Lenses Class 8 Match the Following
Question 1.
Match the items given in Column A with those of given in Column B.
| Column A (Type of lens) | Column B (Properties) |
| (i) Convex lens | (a) Always forms a virtual, diminished image |
| (ii) Concave lens | (b) Can form both real and virtual images |
| (iii) Bifocal lens | (c) Used for correcting vision at multiple distances |
| (iv) Flat lens | (d) Does not converge or diverge light significantly |
Answer:
| Column A (Type of lens) | Column B (Properties) |
| (i) Convex lens | (b) Can form both real and virtual images |
| (ii) Concave lens | (a) Always forms a virtual, diminished image |
| (iii) Bifocal lens | (c) Used for correcting vision at multiple distances |
| (iv) Flat lens | (d) Does not converge or diverge light significantly |
Question 2.
Match the uses of mirrors given in Column A with their applications given in Column B.
| Column A (Use of mirror) | Column B (Application) |
| (i) Side-view mirror | (a) Used in vehicles for rear visibility |
| (ii) Dental mirror | (b) Used by dentists to examine teeth |
| (iii) Security mirror | (c) Used in stores to monitor large areas |
| (iv) Makeup mirror | (d) Provides a clear, upright image for personal grooming |
Answer:
| Column A (Use of mirror) | Column B (Application) |
| (i) Side-view mirror | (a) Used in vehicles for rear visibility |
| (ii) Dental mirror | (b) Used by dentists to examine teeth |
| (iii) Security mirror | (c) Used in stores to monitor large areas |
| (iv) Makeup mirror | (d) Provides a clear, upright image for personal grooming |