Question 1 :
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 infinity and device, image formed is diminished and between focus and optical centre on the same side as that of the object.
Question 2 :
What type of image will form by a convex lens, when an object is placed at infinity.
Question 3 :
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 4 : <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 5 : <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 7 :
Where will the image form by a convex lens, when an object is placed at the focus of the lens.
Question 8 :
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 9 :
What type of image will form by a concave mirror, when an object is placed at centre of curvature of the mirror.
Question 10 :
One student uses a lens of focal length 50 cm and another of –50 cm. What is the power used by each of them, respectively?
Question 11 :
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 mirror?
Question 12 :
What type of image will form by a concave mirror, when an object is placed between pole and focus of the mirror.
Question 14 :
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 15 :
Where will the image form by a concave lens, when an object is placed beyond twice the focal length of the lens.
Question 16 :
Where will the image form by a concave lens, when an object is placed between focus and twice the focal length of the lens.
Question 17 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cea273b230584979b69.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185278c526e972caea24.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 18 :
You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?
Question 19 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19ced273b230584979b6c.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185478c526e972caea2a.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 21 :
In torches, search lights and headlights of vehicles the bulb is placed :
Question 22 :
What type of image will form by a convex mirror, when an object is placed at finite distance from the mirror.
Question 23 : <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 24 :
A pencil when dipped in water in a glass tumbler appears to be bent at the interface of air and water. Will the pencil appear to be bent to the same extent, if instead of water we use liquids like, kerosene or turpentine?
Question 25 : <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 26 :
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 27 :
Obtain an expression for refractive index of a medium with respect to another in terms of speed of light in these two media. (where$v_a, v_b$ = speed of light in two mediums)
Question 28 :
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. At what distance the object has been placed from the mirror?
Question 29 :
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 infinity and device, image formed is diminished and between pole and focus, behind it.
Question 30 :
What type of image will form by a convex lens, when an object is placed at twice the focal length of the lens.
Question 31 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19ce6273b230584979b64.PNG' />
The above figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is :
Question 32 :
In which of the following, the image of an object placed at infinity will be highly diminished and point sized?
Question 33 :
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 34 :
Complete this law of refraction: Incident ray, refracted ray and normal at the point of incidence lie _____________ .
Question 35 :
In torches, search lights and headlights of vehicles the bulb is placed :
Question 36 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cf0273b230584979b70.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185378c526e972caea28.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 37 :
Under which of the following conditions a concave mirror can form an image larger than the actual object?
Question 38 :
What type of image will form by a convex mirror, when an object is placed at finite distance from the mirror.
Question 39 : <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 40 :
Where will the image form by a concave lens, when an object is placed between focus and twice the focal length of the lens.
Question 41 :
In which of the following, the image of an object placed at infinity will be highly diminished and point sized?
Question 42 :
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 43 :
What type of image will form by a concave lens, when an object is placed at the focus of the lens.
Question 44 :
Where will the image form by a convex mirror, when an object is placed at finite distance from the mirror
Question 45 : <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 46 :
Under which of the following conditions a concave mirror can form an image larger than the actual object?
Question 47 :
Where will the image form by a convex lens, when an object is placed at twice the focal length of the lens.
Question 48 :
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 49 :
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. In which direction will she move the screen to obtain a sharp image of the building?
Question 50 :
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?
