Question 1 :
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 2 :
What type of image will form by a concave mirror, when an object is placed between pole and focus of the mirror.

Question 3 :
What type of image will form by a concave mirror, when an object is placed at infinity.

Question 4 :
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 5 :
<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 6 :
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 7 :
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 will be the nature of the image formed if he further shifts the candle towards the lens, after he shifts the candle towards the lens at a position of 31.0 cm?

Question 8 :
Where will the image form by a concave mirror, when an object is placed between focus and centre of curvature of the mirror.

Question 9 :
Which of the following can make a parallel beam of light when light from a point source is incident on it?

Question 10 :
<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 11 :
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 12 :
What type of image will form by a concave mirror, when an object is placed between pole and focus of the mirror.

Question 13 :
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 14 :
<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 15 :
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 16 :
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 17 :
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 18 :
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 19 :
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 20 :
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 21 :
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 22 :
In torches, search lights and headlights of vehicles the bulb is placed :

Question 23 :
What type of image will form by a concave lens, when an object is placed beyond twice the focal length of the lens.

Question 24 :
Where will the image form by a concave mirror, when an object is placed at infinity.

Question 25 :
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.