Download App

Reflection of Light — Science STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9ScienceReflection of Light2 Marks
Question
Principal Focus of Concave and Convex Mirror.
✓

Answer

Principal Focus of the Concave MirrorPrincipal Focus of the Convex Mirror
(i) Incident rays which are parallel to the principal axis of a concave mirror, after reflection from the mirror, meet at a particular point in front of the mirror on the principal axis. This point (F) is called the principal focus of the concave mirror.
(ii) It is formed in front of the mirror.
(iii) Focus of concave mirror is real.		(i) Incident rays parallel to the principal axis, after reflection, appear to come from a particular point behind the mirror lying along the principal axis. This point is called the principal focus of the convex mirror.
(ii) It is formed behind the mirror.
(iii) Focus of convex mirror is virtual.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following questions in detail." from Reflection of Light→Reflection of Light — all question types→Science STD 9 question papers→Maharashtra Board STD 9 question papers→Maharashtra Board question paper generator→

Similar questions

Name the hormones of the following endocrine glands and the function of each :

Thymus

→
Name the hormones of the following endocrine glands and the function of each : Pancreas
→
Which is the most used salt? What is its chemical name? How is it formed?
→
When aluminium oxide reacts with hydrogen fluoride
→
The following table shows current in Amperes and potential difference in Volts.

Find the average resistance.

→
Write note on :

Phanerogams

→
Write down the modes of infection and preventive measures against Malaria and dengue.
→
A bullet having a mass of 10 g and moving with a speed of 1.5 m/s, penetrates a thick wooden plank of mass 90 g. The plank was initially at rest. The bullet gets embedded in the plank and both move together. Determine their velocity. (Ans: 0.15 m/s)
→
Write down the concentration of each of the following solutions in gL and molL.

a. $7.3 g HCl$ in $100 ml$ solution
b. $2 g NaOH$ in $50 ml$ solution
c. $3 g CH CHOH _3 COO 100 ml$ solution
d. $4.9 g H _2 SO _4$ in $200 ml$ solution

→
Establish your own plant nursery near your school or home. Prepare the seedlings of flowering plants, fruit plants, and ornamental plants being grown in your area. Can you start a business in the future with the help of this activity? Think it over.
→