LIGHT

LIGHT

CLASS-VII

ASSIGNMENT-1

Q1. The focal length of a spherical mirror is 10cm. What is the radius of curvature of this spherical mirror?

Q2. Name a mirror that gives an erect and magnified (enlarged) image of an object.

Q3. Where should an object be placed on the principal axis of a concave mirror so that its real image is of the same size as that of the object?

Q4. Name the rear-view mirror used in vehicles.

Q5. No matter how far you stand from a mirror, your image appears erect. The mirror is:

i)                   plane

ii)                 convex

iii)               concave

iv)               either plane or convex

Q6. Name the type of mirror which always forms a virtual and diminished image.

Q7. A man standing in front of a magical mirror, finds his image having a very small head, a fat body and legs of normal (same) size. What type of mirrors are used in this magical mirror?

Q8. Differentiate between virtual image of a concave mirror and of a convex mirror.

Q9. The angle between the incident ray and the mirror is 40.

i)                   What is the angle of incidence?

ii)                 What is the angle of reflection?

Q10. Explain lateral inversion.

Q11. How can you distinguish between a plane mirror, a concave mirror and a convex mirror without touching them?

Q12. The minimum distance between an object and its real image formed by a concave mirror is _________.