NCERT solutions for Class 7 Science Light

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NCERT solutions for Class 7 Science Light book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 7 Science chapter wise NCERT solution for Science Book all the chapters can be downloaded from our website and myCBSEguide mobile app for free.

NCERT solutions for Science Light Download as PDF

NCERT solutions for Class 7 Science Light

NCERT Class 7 Social Science Chapter wise Solutions

  1. Nutrition in Plants
  2. Nutrition in Animals
  3. Fibre To Fabric
  4. Heat
  5. Acids Bases And Salts
  6. Physical And Chemical Changes
  7. Climate
  8. Winds Storms And Cyclones
  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
  17. Forests: Our Lifeline
  18. Waste Water Story

NCERT solutions for Class 7 Science Light

Class–VII (CHAPTER-15)
LIGHT
Question 1. Fill in the blanks:

(a)An image that cannot be obtained on a screen is called —————–.

(b)Image formed by a concave ———- is always virtual and smaller in size.

(c)An image formed by a ————- mirror is always of the same size as that of the object.

(d)An image which can be obtained on a screen is called a ——— image.

(e)An image formed by a concave —————- cannot be obtained on a screen.

Answer:

Fill in the blanks:

(a)An image that cannot be obtained on a screen is called virtual image.

(b)Image formed by a concave mirror is always virtual and smaller in size.

(c)An image formed by a plane mirror is always of the same size as that of the object.

(d)An image which can be obtained on a screen is called a real image.

(e)An image formed by a concave lens cannot be obtained on a screen.


NCERT solutions for Class 7 Science Light

Question 2.Mark “T” if the statement is true and “F’ if it is false.

(a)We can obtain an enlarged and erect image by a convex mirror. (T/F)

(b)A concave lens always forms a real image. (T/F)

(c)We can obtain a real, enlarged and inverted image by a concave mirror. (T/F)

(d)A real image cannot be obtained on screen. (T/F)

(e)A concave mirror always forms a real image. (T/F)

Answer:

(a) F

(b) F

(c) T

(d) F

(e) F


Question 3.Match the items given in Column I with one or more item of Column II.
(a) A plane mirror(i) used as magnifying glass.
(b) A convex mirror(ii) can form image of objects spread over large area.
(c) A convex lens(iii) used by dentist to see enlarged image of teeth.
(d) A concave mirror(iv) the image is always inverted and magnified.
(e) A concave lens(v) the image is erect and of the same size than object.
(vi) the image is erect and smaller in size than the object.

Answer:

(a) (v)

(b) (ii)

(c) (i)

(d) (iii)

(e) (vi)


NCERT solutions for Class 7 Science Light

Question 4.State the characteristic of the image formed by a plane mirror.

Answer:

Characteristics of image formed by plane mirror are:

(a) Image distance is equal to object distance.

(b) image height is equal to object height.

(c) Image is virtual and erect


Question 5.Find out the letters of English alphabet or any other language known to you in which the image formed in plane mirror appears exactly like the letter itself. Discuss your findings.

Answer:

A, H, O, T, U, V, W, X, Y.


NCERT solutions for Class 7 Science Light

Question 6.What is a virtual image? Give one situation where a virtual image is formed.

Answer:

The image that cannot be formed on a screen is called virtual image. Plane mirror always form virtual image.


Question 7.State the differences between convex and a concave lens.

Answer:

Difference between convex lens and concave lens:

Concex imageConcave image
  1. Thick at middle, thin at edge.
  2. Can form real image.
  1. Thin at middle, thick at edge.
  2. Cannot form real iamge.

NCERT solutions for Class 7 Science Light

Question 8.Give one use of a concave and a convex mirror.

Answer:

Concave mirror – used by dentist to see teeth.

Convex mirror – used in vehicles as rear view mirror.


Question 9.Which type of lens forms always a real image?

Answer:

Concave mirror.


Question 10.Which type of lens forms always a virtual image?

Choose the correct option in questions 11-13.

Answer:

Concave lens.


NCERT solutions for Class 7 Science Light

Question 11.A virtual image larger than the object can be produced by a

(i)Concave lens

(ii)Concave mirror

(iii)Convex lens

(iv)Plane mirror

Answer:

(iii)concave mirror.


Question 12.David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. if he moves 1 m towards the mirror, then the distance between David and his image will be

(i) 3 m

(ii) 5 m

(iii) 6 m

(iv) 8 m

Answer:

(iii) 6 cm.


NCERT solutions for Class 7 Science Light

Question 13.The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m/s. The driver sees in his rear view mirror the image of a truck parked behind the car. The speed at which the image of the truck appears to approach the driver will be

(i) 1 m/s

(ii) 2 m/s

(iii) 4 m/s

(iv) 8 m/s.

Answer:

(iii) 4 m/s.

NCERT solutions for Class 7 Science

NCERT Solutions Class 7 Science PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 7 Science includes text book solutions for CBSE Class 7 Science have total 18 chapters. 7 Science NCERT Solutions in PDF for free Download on our website. Ncert Science class 7 solutions PDF and Social Science ncert class 7 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide.

CBSE app for Class 7

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