Question

Р.
5. Write the answers to the following questions with reference to figure 1.13.
(i) Write the name of the opposite ray of ray RP
(ii) Write the intersection set of ray PQ and ray RP.
T S R
Fig. 1.13
(iii) Write the union set of ray PQ and ray QR.
(iv) State the rays of which seg QR is a subset.
(v) Write the pair of opposite rays with common end point R.
(vi) Write any two rays with common end point S.
(vii) Write the intersection set of ray SP and ray ST.​

Answer 1

The two rays chosen to construct a ray diagram are shown in the ray diagram given below.

(i) Ray I: When the incident ray is parallel to the principal axis, the reflected ray will pass through the focus of concave mirror.

(ii) Ray II: When the incident ray passes through or appears to pass through the centre of curvature, the light, after reflection from the spherical mirror, reflects back along the same path.

The image formed is real, inverted and magnified. It is formed beyond the centre of curvature.

Answer 2

Step-by-step explanation:

i. Ray RS or ray RT

ii. Ray PQ

iii. Line QR

iv. Ray QR, ray QS, ray QT, ray RQ, ray SQ, ray TQ

v. Ray RP and ray RS, ray RQ and ray RT

vi. Ray ST, ray SR

vii. Point S