Trigonometric Ratios - Introduction To Trigonometry, Class 10 Mathematics - Class 10 MCQ

The name and radius of curvature of a spherical mirror whose focal length is +2 cm is​

No refraction occurs when light goes from​

An object is situated at a distance of f/2 from a convex lens of focal length f. Distance of image will be​

 After reflection through a concave mirror, rays of light

Virtual image forms

 Which lens always forms a virtual image?

What will happen when a ray enters from glass to air medium?

 If the magnification has a negative sign, the image formed by the concave mirror must be

An object 4 cm tall is placed in front of a convex lens. It produces an image 3 cm tall. What is the magnification of the lens?​

Two thin lenses of power +3.5 D and -2.5 D are placed in contact. Find the focal length of the lens combination.​

 Rahul is standing in front of a plane mirror. The distance between Rahul and his image is 150cm. If Rahul’s distance from the mirror is x. What could be the possible value of x?​

The mirror used as rear view mirror is​

Which one of the following materials cannot be used to make lens?

 In a convex lens, where is the image formed, when an object is placed at 2F?​

 If the radius of curvature of a spherical mirror is 34.52 cm, then the focal length of that spherical mirror is​

The focal length of a plane mirror is

 A ray of light passes through the focus of the mirror. After reflection, it

An object is placed on the principal axis of a spherical mirror. The object distance u is:

The mirror formula is valid for​

 Raj is standing in front of a plane mirror. The distance between Raj and his image is 100cm. If the distance between the mirror and image is x. What could be the possible value of x?​

The ratio of sine of angle of incidence to the sine of angle of refraction equals refractive index is called​

 When the image is of double size as the object, the magnification is