When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of the light ray decreases after some reflections. This is because of
A Poor reflection from mirrors
B Absorption of some amount of light by mirrors
C Dispersion of light when the rays travel through the atmosphere
D Scattering of light by the mirrors.
Advika studies in 1st standard and is fond of eating. She looks healthy but falls ill
frequently. Which of the following food items she probably does not include in her diet?
Which of the following statements is correct?
A A cyclone warning is issued up to 6 hours in advance by the government.
B Wind currents are generated due to sea breeze.
C A lightning conductor installed in a building repels the lightning.
D A thunderstorm is accompanied by lightning.
Option D is correct
Neha lives in a hostel and has six roommates. Out of them four fell ill. Which of them can make Neha fall ill?
A Rati who has anaemia
B Sashi who has scurvy
C Nidhi who developed a dust allergy
D Swati who has cold
C IS THE RIGHT ANSWER
Refer to the given flow chart and select the correct option regarding P, Q and R.
AQ refers to vitamin B-complex.
BOur body can synthesise R and P hence we need not to include them in our diet.
CP is obtained from citrus fruits like lemon, orange etc.
DDeficiency of P leads to rickets whereas deficiency of R leads to beri-beri.
The given graph shows the temperature changes when a sample of ice is heated.
Select the correct option.
AAt point 1, liquid is evaporating.
BAt point 2, ice is in solid state.
CAt point 4, ice is in vapour state.
DNone of these