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 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19ceb273b230584979b6a.PNG' /> <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc185278c526e972caea25.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 3 :
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 4 :
Which of the following can make a parallel beam of light when light from a point source is incident on it?

Question 5 :
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 6 :
In torches, search lights and headlights of vehicles the bulb is placed :

Question 7 :
Where will the image form by a concave mirror, when an object is placed between pole and focus of the mirror.

Question 8 :
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 9 :
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 10 :
Where will the image form by a concave mirror, when an object is placed between focus and centre of curvature of the mirror.

Question 11 :
Where will the image form by a concave mirror, when an object is placed at centre of curvature of the mirror.

Question 12 :
What type of image will form by a convex mirror, when an object is placed at infinity.

Question 13 :
<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 14 :
What type of image will form by a convex lens, when an object is placed between optical centre and focus of the lens.

Question 15 :
Where will the image form by a concave lens, when an object is placed between focus and twice the focal length of the lens.