Objective Problems [Level 1]

Which of the following can form a virtual, erect and magnified image?

Match List I (Phenomenon) with List II (Principle) and select the correct answer using the codes given below the lists.

A convex and a concave mirror of radii $10 \mathrm{cm}$ each are placed facing each other and $15 \mathrm{cm}$ apart. An object is placed exactly between them. If the reflection first takes place in concave and then in convex mirror, the position of the final image will be

When the bodies placed in a dark room are exposed to $X$-rays, they appear

The work of Prof. Raman for which he was awarded Nobel Prize was concerned with

A double convex glass lens $\left(R_1=R_2=10 \mathrm{cm}\right)$ having focal length equal to the focal length of a concave mirror. The radius of curvature of the concave mirror is $\left({\mu }_g=1.5\right)$

Rainbow is observed when the sun is

Figure shows two rays $A$ and $B$ being reflected by a mirror and going as $A^{\text{'}}$ and $B^{\text{'}}$. The mirror