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Chapters
2: Nutrition in Animals
3: Fibre to Fabric
4: Heat
5: Acids, Bases and Salts
6: Physical and Chemical Changes
7: Weather, Climate and Adaptation of Animals to Climate
8: Wind, Storm and Cyclone
9: Soil
10: Respiration in Organisms
11: Transportation in Animals and Plants
12: Reproduction in Plants
13: Motion and Time
14: Electric Current and Its Effects
▶ 15: Light
16: Water : A Precious Resource
17: Forests : Our Lifeline
18: Wastewater Story
![NCERT Exemplar solutions for Science [English] Class 7 chapter 15 - Light - Shaalaa.com](/images/science-english-class-7_6:5f2b1b2038084cf381bfa42c826a928c.jpg "NCERT Exemplar solutions for Science [English] Class 7 chapter 15 - Light")
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Solutions for Chapter 15: Light
Below listed, you can find solutions for Chapter 15 of CBSE NCERT Exemplar for Science [English] Class 7.
NCERT Exemplar solutions for Science [English] Class 7 15 Light MULTIPLE CHOICE QUESTIONS [Pages 80 - 81]
Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli are, respectively
plane mirror and concave mirror.
concave mirror and convex mirror
plane mirror and convex mirror
convex mirror and plane mirror
Which of the following can be used to form a real image?
Concave mirror only.
Plane mirror only.
Convex mirror only
Both concave and convex mirrors.
If an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be
2m
1m
0.5 m
0.25 m
You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an enlarged image of an object you can use either
concave mirror or convex mirror
concave mirror or convex lens
concave mirror or concave lens
concave lens or convex lens
A rainbow can be seen in the sky
when the sun is in front of you.
when the sun is behind you.
when the sun is overhead
only at the time of sunrise.
An erect and enlarged image can be formed by
only a convex mirror.
only a concave mirror.
only a plane mirror.
both convex and concave mirrors.
You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from
both concave lens and convex lens.
both concave mirror and convex mirror
both concave mirror and convex lens.
both convex mirror and concave lens.
An image formed by a lens is erect. Such an image could be formed by a
the convex lens provided the image is smaller than an object.
the concave lens provided the image is smaller than an object.
the concave lens provided the image is larger than an object.
the concave lens provided the image is of the same size.
NCERT Exemplar solutions for Science [English] Class 7 15 Light VERY SHORT ANSWER QUESTIONS [Pages 81 - 82]
The image formed by a lens is always virtual, erect and smaller in size than an object kept at different positions in front of it. Identify the nature of the lens.
Fill in the blanks:
The inner surface of a steel spoon acts as a ___________ mirror.
The outer surface of a flat steel plate acts as a ___________ mirror.
The outer shining surface of a round bottom steel bowl acts as a __________ mirror.
The inner surface of the reflector of a torch acts as a __________ mirror
State whether the following statement is True or False
A concave lens can be used to produce an enlarged and erect image.
True
False
State whether the following statement is True or False
A convex lens always produces a real image.
True
False
State whether the following statement is True or False
The sides of an object and its image formed by a concave mirror are always interchanged.
True
False
State whether the following statement is True or False
An object can be seen only if it emits light.
True
False
NCERT Exemplar solutions for Science [English] Class 7 15 Light SHORT ANSWER QUESTIONS [Pages 82 - 83]
What type of mirror is used as a side mirror in a scooter? Why is this type of mirror chosen?
Observe the figures given in Figure 15.1 carefully.
The given figures show the path of light through lenses of two different types, represented by rectangular boxes A and B. What is the nature of lenses A and B?
Boojho made light from a laser torch fall on a prism. Will he be able to observe a band of seven colours? Explain with a reason
State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in Figure 15.2.
The side mirror of a scooter got broken. The mechanic replaced it with a plane mirror. Mention any inconvenience that the driver of the scooter will face while using it?
The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?
An erect and enlarged image of an object is formed on a screen. Explain how this could be possible.
Two different types of lenses are placed on a sheet of newspaper. How will you identify them without touching them?
A shopkeeper wanted to fix a mirror that will give a maximum view of his shop. What type of mirror should he use? Give reason.
The distance between an object and a convex lens is changing. It is noticed that the size of the image formed on a screen is decreasing. Is the object moving in a direction towards the lens or away from it?
NCERT Exemplar solutions for Science [English] Class 7 15 Light LONG ANSWER QUESTIONS [Page 83]
Suppose we wish to obtain the real image of a distant tree. Explain two possible ways in which we can do it.
It was observed that when the distance between an object and a lens decreases, the size of the image increases. What is the nature of this lens? If you keep on decreasing the distance between the object and the lens, will you still be able to obtain the image on the screen? Explain.
You are given three mirrors of different types. How will you identify each one of them?
Solutions for 15: Light
NCERT Exemplar solutions for Science [English] Class 7 chapter 15 - Light
Shaalaa.com has the CBSE Mathematics Science [English] Class 7 CBSE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT Exemplar solutions for Mathematics Science [English] Class 7 CBSE 15 (Light) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. NCERT Exemplar textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Science [English] Class 7 chapter 15 Light are Light, The propagation of light, Reflection of Light, Mirrors, Plane Mirror, Lateral Inversion, Divergence and Convergence of Light, Spherical Mirrors, Formation of Image by Reflection: Real and Virtual Image, Concave Mirror, Convex Mirror, Images Formed by Sperical Lenses, Colour, Dispersion of Light Through Prism and Formation of Spectrum, Concept of Lenses, Prism.
Using NCERT Exemplar Science [English] Class 7 solutions Light exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in NCERT Exemplar Solutions are essential questions that can be asked in the final exam. Maximum CBSE Science [English] Class 7 students prefer NCERT Exemplar Textbook Solutions to score more in exams.
Get the free view of Chapter 15, Light Science [English] Class 7 additional questions for Mathematics Science [English] Class 7 CBSE, and you can use Shaalaa.com to keep it handy for your exam preparation.
