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Class 10 Exam  >  Class 10 Tests  >  Case Based Questions Test: Light- Reflection & Refraction - 1 - Class 10 MCQ

Case Based Questions Test: Light- Reflection & Refraction - 1 - Class 10 MCQ


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10 Questions MCQ Test - Case Based Questions Test: Light- Reflection & Refraction - 1

Case Based Questions Test: Light- Reflection & Refraction - 1 for Class 10 2024 is part of Class 10 preparation. The Case Based Questions Test: Light- Reflection & Refraction - 1 questions and answers have been prepared according to the Class 10 exam syllabus.The Case Based Questions Test: Light- Reflection & Refraction - 1 MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Case Based Questions Test: Light- Reflection & Refraction - 1 below.
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Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 1
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Following figure illustrates the ray diagram for the formation of images by a concave mirror. The position of the object is beyond the centre of curvature of the concave mirror. On the basis of given diagram, answer the questions.

If the focal length of the concave mirror is 10 cm, the image formed will be at a distance ___________.

Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 1
It is one of the characteristics of a plane mirror that, the distance of the plane mirror from the object is equal to its distance from the image. Therefore, given distance between object and mirror = 10cm. Distance between mirror and image = 10cm. Thus, the distance between object and image = 10 + 10 = 20cm.
Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 2
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Following figure illustrates the ray diagram for the formation of images by a concave mirror. The position of the object is beyond the centre of curvature of the concave mirror. On the basis of given diagram, answer the questions.

If the size of the object in the given figure is 5 cm and the magnification produced is –0.5. The size of the image is (in cm) ___________

Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 2
As we know, magnification,

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Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 3
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Following figure illustrates the ray diagram for the formation of images by a concave mirror. The position of the object is beyond the centre of curvature of the concave mirror. On the basis of given diagram, answer the questions.

An image formed by concave mirror is virtual, when the object is placed:

Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 3
A plane mirror will always produce a virtual image. A concave mirror will only produce a virtual image if the object is located in front of the focal point.
Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 4
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Read the following passage and answer the questions.

A student wants to project the image of a candle flame on the walls of the school laboratory by using a mirror.

At what distance, in terms of focal length ‘f’ of the mirror, should he place the candle flame to get the magnified image on the wall ?
Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 4
(i) In order to form a magnified image on the wall, the candle flame should be placed between F and 2F from the lens.

(ii) In order to form a diminished image on the wall, the candle flame should be placed at a distance greater than 2F from the lens.

Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 5
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Read the following passage and answer the questions.

A student wants to project the image of a candle flame on the walls of the school laboratory by using a mirror.

If the image formed by this mirror is inverted and real, the magnification will be:
Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 5
For a real and inverted image, the height of the image is negative and the height of the object is positive. So the magnification of the mirror is negative.
Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 6
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Read the following passage and answer the questions.

A student wants to project the image of a candle flame on a screen 30 cm in front of a mirror by keeping the flame at a distance of 15 cm from its pole.

Suggest the type of mirror he should use:
Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 6
He should use a concave mirror, as it forms a real image on the same side of the mirror. The minus sign in magnification shows that the image formed is real and inverted.
Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 7
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Read the following passage and answer the questions.

A student wants to project the image of a candle flame on a screen 30 cm in front of a mirror by keeping the flame at a distance of 15 cm from its pole.

When object distance is less than focal length the image is _______ and when object distance is more than focal length the image is ______.
Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 7
As the object distance approaches one focal length, the image distance and image height approaches infinity. Then altering the object distance to values less than one focal length produces images that are upright, virtual and located on the same side of the lens as the object.
Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 8
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Read the following passage and answer the questions.

A student wants to project the image of a candle flame on a screen 30 cm in front of a mirror by keeping the flame at a distance of 15 cm from its pole.

The image formed in the above case is:
Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 8

A real image occurs where rays converge, whereas a virtual image occurs where rays only appear to diverge. Real images can be produced by concave mirrors and converging lenses, only if the object is placed further away from the mirror/lens than the focal point, and this real image is inverted.

Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 9
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Read the passage and note the following observations. Answer the questions.

A student focussed the image of a candle flame on a white screen by placing the flame at various distances from a convex lens. He noted his observations as:

Which set of observations is incorrect and why?
Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 9
(a) From the table of observation, it is clear that for u = 30, v = 30 cm. This means that both u and v must be equal to twice the focal length of the convex lens. Focal length of the convex lens = 30/2 = 15cm.

(b) The observation (v) is incorrect. For this observation u = 15 = /, i.eThe object is at the focus and the image must be formed at infinity and not 70 cm.

(c) Since m = v/u , the size of the image will be equal to the size of the object, if v = u i.e., for the observation (iii).

Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 10
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Read the passage and note the following observations. Answer the questions.

A student focussed the image of a candle flame on a white screen by placing the flame at various distances from a convex lens. He noted his observations as:

What is the change in image observed as the object is moved from infinity towards the concave lens?
Detailed Solution for Case Based Questions Test: Light- Reflection & Refraction - 1 - Question 10
As the object is brought closer from infinity towards the convex lens, the size of image increases. When the object is at infinity, point-sized image is formed, while object at focus gives highly enlarged image.
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