Question 1 :
What type of image will form by a convex lens, when an object is placed at twice the focal length of the lens.
Question 2 :
What type of image will form by a convex mirror, when an object is placed at finite distance from the mirror.
Question 3 :
What type of image will form by a concave mirror, when an object is placed between pole and focus of the mirror.
Question 4 :
Complete this law of refraction: Ratio of sine of angle of incidence and sine of angle of refraction is ________________ for the given color and pair of media.
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 : <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 7 :
What type of image will form by a convex mirror, when an object is placed at infinity.
Question 8 :
What type of image will form by a concave lens, when an object is placed at the focus of the lens.
Question 9 :
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 10 :
Where will the image form by a convex lens, when an object is placed at twice the focal length of the lens.
Question 11 :
How is the refractive index of a medium related to the speed of light? (where c = speed of light in vacuum and v = speed of light in that medium)
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 :
State TRUE or FALSE : A light ray incident on a rectangular glass slab immersed in any medium emerges parallel to
itself.
Question 14 :
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 15 :
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 16 : <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 17 :
Where will the image form by a convex lens, when an object is placed between optical centre and focus of the lens.
Question 18 :
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
Where will the image be formed if he shifts the candle towards the lens at a position of 31.0 cm?
Question 19 :
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 21 :
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 22 :
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 23 : <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 24 : <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 25 :
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 27 :
Where will the image form by a convex lens, when an object is placed at infinity.
Question 28 :
Under which of the following conditions a concave mirror can form an image larger than the actual object?
Question 29 :
Under which of the following conditions a concave mirror can form an image larger than the actual object?
Question 30 :
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 31 :
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 32 :
What type of image will form by a concave mirror, when an object is placed at centre of curvature of the mirror.
Question 33 : <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 34 :
What type of image will form by a concave lens, when an object is placed beyond twice the focal length of the lens.
Question 35 :
What type of image will form by a concave mirror, when an object is placed a little beyond centre of curvature of the mirror.
Question 36 :
What type of image will form by a concave mirror, when an object is placed a little beyond centre of curvature of the mirror.
Question 37 :
Where will the image form by a concave mirror, when an object is placed between pole and focus of the mirror.
Question 38 :
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 39 :
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
Where will the image be formed if he shifts the candle towards the lens at a position of 31.0 cm?
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.
