If the Magnification produced by a Convex Lens is - 1 . 5 , what would be the position and nature of the image.

Given that, Magnification m = - 1 . 5 Magnification of the lens is m = h i h o = v u ( h i is the height of the image, h o height of the object, v is the image distance and u is the object distance) To produce magnification as negative, object should be placed in between focus and radius of curvature of the convex lens. Nature of image : Real, inverted and magnified image on the other side of the object. Position of the image: Image is formed beyond the centre of curvature on the other side of the object. (AB is object and A'B' is image)

Draw a Ray diagram to show the formation of an image when the object is placed between the pole and the focus of a Concave Mirror.

When an object is placed between F and P in front of a concave mirror, it forms virtual, erect and magnified image behind the mirror. AB is object, A ' B ' is image, P is pole of the mirror, F is the focus of the concave mirror and C is the radius of curvature.

Vimal combs her hair is front of a plane mirror. Write two characteristics of her image.

Characteristics of the image produced by the plane mirror. The plane mirror always produces virtual, erect and same size image. The plane mirror produces image as laterally inverted. Lateral inversion represents the appearance right as left and left as right in the mirror.

Name the law represented by the formula: n = sin i sin r

When light ray enters obliquely from rarer medium to denser medium it bends towards the normal. When light ray enters perpendicular to the refracting slab then it passes without deviation. The relation between angle of incidence and angle of refraction is given by snell's law. sin i sin r = constant (Refractive index of the medium μ ) It is also given by μ = c v ( c is speed of light in vacuum and v is speed of light in medium)

A ray of light travelling in air enters obliquely into a glass slab. Does the ray move towards the normal or away from it?

When light ray enters obliquely from rarer medium to denser medium it bends towards the normal. When light ray enters perpendicular to the refracting slab then it passes without deviation. The relation between angle of incidence and angle of refraction is given by sin i sin r = constant .

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Goa Board-2019>Q 14

MEDIUM

10th Goa Board

IMPORTANT

Earn 100

Draw Ray diagram to show the formation of an image when the object is placed between $F_{1}$ and $2 F_{1}$ of a convex lens.

Important Questions on Light - Reflection and Refraction

MEDIUM

10th Goa Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 10 - Light - Reflection and Refraction>Goa Board-2019>Q 15

An object is placed at a distance of $15 cm$ in front of a Concave Mirror. If an image of its is formed at $30 cm$ from the mirror, find the focal length of the mirror.