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- BYJUS Online learning Programs For K3, K10, K12, NEET, JEE, UPSC . . .
Focus Incidence: When a ray passes through the focus and strikes a concave or convex mirror, the reflected ray will be parallel to the principal axis This characteristic holds for concave and convex mirrors and is crucial in determining the path of reflected rays
- BYJUS Online learning Programs For K3, K10, K12, NEET, JEE, UPSC . . .
Principal focus: Principal focus is defined as a point at which the reflected rays meet or appear to meet for the spherical mirror For a concave mirror, the principal focus is in the front and for a convex mirror, the principal focus is at the behind Below is an experiment to determine the focal length of a concave mirror and convex lens
- NCERT Solutions for Class 10 Science Chapter 10 Light Reflection and . . .
Answer- Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror This point is called the principal focus of the concave mirror
- BYJUS Online learning Programs For K3, K10, K12, NEET, JEE, UPSC . . .
Focus Focus is the point onto which collimated light parallel to the axis is focused Focal Length The focal length is the distance between the optical centre and the focal point or focus of the lens Power The power of the lens is the reciprocal of its focal length The SI unit of power is dioptre Also Read: Wave Optics Types of Lenses
- What is focal point? - BYJUS
For a lens, or a spherical or parabolic mirror, it is a point onto which collimated light parallel to the axis is focused Since light can pass through a lens in either direction, a lens has two focal points—one on each side The distance in air from the lens or mirror's principal plane to the focus is called the focal length
- Define focus and principal focus of a lens. Derive mirror formula for a . . .
Principal focus is the point on the principal axis at which a parallel beam of light or light coming from infinity, travelling parallel to the principal axis after refraction through the lens comes to meet or appears to come from Problem: 1 5 Mark For a concave mirror i) When image formed is real u is –ve v is –ve f is –ve 1 −f = 1 −
- BYJUS Online learning Programs For K3, K10, K12, NEET, JEE, UPSC . . .
The focal length of a mirror is represented as f and is defined as the distance between the focus and the pole of the mirror The radius of curvature is represented as R and is defined as the radius of the mirror that forms a complete sphere
- Definition of Convex Lens - BYJUS
Definition of Convex Lens This type of lens is thicker at the centre and thinner at the edges An optical lens is generally made up of two spherical surfaces If those surfaces are bent outwards, the lens is called a biconvex lens or simply a convex lens These types of lenses can converge a beam of light coming from outside and focus it to a point on the other side This point is known as the
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