Question 1 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cee273b230584979b6d.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185478c526e972caea2b.PNG' />
In the above images, the first image is the ray of light incident on a convex lens and the second image is the complete path of the ray. Is the second image correct depiction of the path?
Question 2 :
Where will the image form by a convex lens, when an object is placed between focus and twice the focal length of the lens.
Question 3 :
A convex lens of focal length 20 cm can produce a magnified virtual as well as real image. Where shall the object be placed for obtaining REAL image?
Question 4 :
State TRUE or FALSE : A light ray incident on a rectangular glass slab immersed in any medium emerges parallel to
itself.
Question 5 :
A student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle screen and the lens as under:
Position of candle = 12.0 cm, Position of convex lens = 50.0 cm, Position of the screen = 88.0 cm
What is the focal length of the convex lens?
Question 6 :
A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is :
Question 7 :
What type of image will form by a convex mirror, when an object is placed at finite distance from the mirror.
Question 8 :
Where will the image form by a convex lens, when an object is placed at twice the focal length of the lens.
Question 9 :
The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. If the image is three times the size of the flame and the distance between lens and image is 80 cm, at what distance should the candle be placed from the lens?
Question 10 :
The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. If the image is three times the size of the flame and the distance between lens and image is 80 cm, at what distance should the candle be placed from the lens?
Question 11 :
A convex lens of focal length 20 cm can produce a magnified virtual as well as real image. Is this a correct statement?
Question 12 :
A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.
Question 13 :
What type of image will form by a convex lens, when an object is placed between focus and twice the focal length of the lens.
Question 14 :
What type of image will form by a convex lens, when an object is placed at the focus of the lens.
Question 15 :
Magnification produced by a rear view mirror fitted in vehicles :
Question 16 :
Magnification produced by a rear view mirror fitted in vehicles :
Question 17 :
What type of image will form by a concave mirror, when an object is placed between focus and centre of curvature of the mirror.
Question 18 :
Size of image of an object by a mirror having a focal length of 20 cm is observed to be reduced to 1/3rd of its size. What is the nature of the image?
Question 19 :
Which of the following can make a parallel beam of light when light from a point source is incident on it?
Question 20 :
A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.
Question 21 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19ce8273b230584979b66.PNG' />
In the above image, the Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown. Which of the following could be inside the box?
Question 22 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cec273b230584979b6b.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185378c526e972caea26.PNG' />
In the above images, the first image is the ray of light incident on a concave mirror and the second image is the complete path of the ray. Is the second image correct depiction of the path?
Question 23 :
A full length image of a distant tall building can definitely be seen by using :
Question 24 :
What type of image will form by a convex lens, when an object is placed at infinity.
Question 25 :
Where will the image form by a concave mirror, when an object is placed between pole and focus of the mirror.
Question 26 :
What type of image will form by a convex mirror, when an object is placed at infinity.
Question 27 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cea273b230584979b68.jpg' />
In the above image, the path of a ray of light coming from air passing through a rectangular glass slab is traced by four students are shown as A, B, C and D in the options. Which one of them is correct?
Question 28 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cee273b230584979b6d.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185478c526e972caea2b.PNG' />
In the above images, the first image is the ray of light incident on a convex lens and the second image is the complete path of the ray. Is the second image correct depiction of the path?
Question 29 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19ce8273b230584979b66.PNG' />
In the above image, the Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown. Which of the following could be inside the box?
Question 30 :
One student uses a lens of focal length 50 cm and another of –50 cm. What is the nature of the lens respectively?
Question 31 :
A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is :
Question 33 :
Where will the image form by a concave mirror, when an object is placed at centre of curvature of the mirror.
Question 34 :
Identify the device used as a spherical mirror or lens in the given case. When the image formed is virtual and erect in this case.
CASE: Object is placed between device and its focus, image formed is enlarged and behind it.
Question 35 :
Refractive index of diamond with respect to glass is 1.6 and absolute refractive index of glass is 1.5. Find out the absolute refractive index of diamond.
Question 36 :
What type of image will form by a convex lens, when an object is placed at twice the focal length of the lens.
Question 37 :
What type of image will form by a concave mirror, when an object is placed between pole and focus of the mirror.
Question 38 :
Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?
Question 39 :
What type of image will form by a concave lens, when an object is placed between focus and twice the focal length of the lens.
Question 40 :
Identify the device used as a spherical mirror or lens in the given case. When the image formed is virtual and erect in this case.
CASE: Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object.
Question 41 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cec273b230584979b6b.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185378c526e972caea26.PNG' />
In the above images, the first image is the ray of light incident on a concave mirror and the second image is the complete path of the ray. Is the second image correct depiction of the path?
Question 42 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19ce9273b230584979b67.PNG' />
In the above image, the beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as shown. Which of the following could be inside the box?
Question 43 :
The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. If the image is three times the size of the flame and the distance between lens and image is 80 cm, What is the nature of the image at a distance of 80 cm?
Question 44 :
A convex lens of focal length 20 cm can produce a magnified virtual as well as real image. Where shall the object be placed for obtaining VIRTUAL image?
Question 45 :
Where will the image form by a convex lens, when an object is placed at the focus of the lens.
Question 46 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19ce9273b230584979b67.PNG' />
In the above image, the beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as shown. Which of the following could be inside the box?
Question 47 :
The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. If the image is three times the size of the flame and the distance between lens and image is 80 cm, What is the nature of the lens.
Question 48 :
Sudha finds out that the sharp image of the window pane of her science laboratory is formed at a distance of 15 cm from the lens. She now tries to focus the building visible to her outside the window instead of the window pane without disturbing the lens. What is the approximate focal length of this lens?
Question 50 :
What type of image will form by a concave lens, when an object is placed at the focus of the lens.
