1.
A divergent lens will produce
2.
Large number of thin stripes of black paint are made on the surface of a convex lens of focal length 20 cm to catch the image of a white horse. The image will be
3.
Light from the Sun falling on a convex lens will converge at a point called
4.
You are given three media A, B and C of refractive index 1.33, 1.65 and 1.46. The medium in which the light will travel fastest is
5.
The refractive index of water is 1.33. The speed of light in water will be
6.
The refractive index of transparent medium is greater than one because
7.
The angle of incidence i and refraction r are equal in a transparent slab when the value of i is
8.
As light travels from a rarer to a denser medium it will have
9.
If a man's face is 25 cm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be
10.
The nature of the image formed by concave mirror when the object is placed between the focus (F) and centre of curvature (C) of the mirror observed by us is