Geeta placed three objects made of different materials as shown in the figure. She observed a bright spot of light at (II) but (III) would not get any spot. Then,
A (I) and (II) are made of transparent materials and (III) is made of opaque material.
B (I) is made of transparent material, (II) is made of translucent material and (III) is made of opaque material.
C (I) is made of transparent material, (II) is made of opaque material and (III) is made of either transparent or opaque or translucent material.
D (I) and (II) are made of opaque material and (III) is made of transparent material.
Answer can be B also because (iii) did not get any spot so it should be opaque and (ii) is translucent as a direct source of light is coming from the torch because (i) is transparent.
The descending order of heat conducting property of four metals a, b, c and d is a > b > c > d.
An experiment was conducted to find out how these different metals, when combined, will conduct heat. A small ball of candle wax was placed on one end and a flame near the other end. The set-ups are shown below. In which set-up will the wax drop off first?
Good night images with baby pictures and pics of the page for an email address for the program to be in the process of getting the the one who is the cleverest birbal or gopal bhar ke liye bhi kuch nahi hai kya tu bhi na kabhi to nahi hai kya tu bhi na kabhi to nahi hai kya tu bhi na
Study the given family tree of Rekha and select the correct option regarding it.
ARekha's grandmother has three daughters and one son.
BRekha has two sisters and one brother.
CRekha has one cousin.
DRekha's grandfather has two married daughters.
Consider the following statements (i) - (iv) and select the option that correctly identifies true (T) and false (F) ones.
(i) Sucrose is the sugar found in milk.
(ii) Saturated fats are solids at room temperature while unsaturated fats are liquids.
(iii) Fat soluble vitamins are not stored in our body and need to be regularly supplied through food.
(iv) Vitamin C is very sensitive to heat and is easily destroyed during cooking.
(v) Our body can make two vitamins, i.e., vitamin K and vitamin D.
In the following figures, optical instruments are placed inside boxes (A) and (B). Which of the following options is correct for these?
A In (A), the incident rays are diverged after refractions, so lens is concave.
B In (B), the incident rays are converged after refraction so mirror is convex.
C In (A), the incident rays are diverged after refraction so mirror is convex.
D In (B), the incident rays are converged after refraction so lens is concave.
Aren't both options A and B correct?