A focal length of a lens is 10 cm. What is power of a lens in dioptre?
A focal length of a lens is 10 cm. What is power of a lens in dioptre? Options (a) 0.1…
8 years ago
Questions
A luminous object is seperated from a screen by distance d. A convex lens
A luminous object is seperated from a screen by distance d. A convex lens is placed between the object and…
8 years ago
Two lenses of power 15 D and -3 D are placed in contact.
Two lenses of power 15 D and -3 D are placed in contact. The focal length of the combinations is…
8 years ago
The equiconvex lens has focal length f. If it is cut perpendicular to the principal
The equiconvex lens has focal length f. If it is cut perpendicular to the principal axis passing through optical centre,…
8 years ago
In vacuum, to travel distance d, light takes time t and in medium to travel distance
In vacuum, to travel distance d, light takes time t and in medium to travel distance 5d, it takes time…
8 years ago
An object placed at 20 cm in front of a concave mirror produces three times
An object placed at 20 cm in front of a concave mirror produces three times magnified real image. What is…
8 years ago
To get three images of single object, one should have two plane mirrors at an angle of
To get three images of single object, one should have two plane mirrors at an angle of Options (a) 60⁰…
8 years ago
To measure the roughness of the surface of a material, which of the following microscope
To measure the roughness of the surface of a material, which of the following microscope is preferred for better result…
8 years ago
A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰
A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰, a ray is…
8 years ago
The limiting angle of incidence for an optical ray that can be transmitted
The limiting angle of incidence for an optical ray that can be transmitted by an equilateral prism of refractive index…
8 years ago