Light

Q. Algae which are commonly found in the depths of oceans

1. Environmental resistance
2. Biotic potential
3. Fecundity
4. Morbidity

Q. The following image shows the penetration capacity of different colours of visible light in open ocean and coastal waters.

Name the types of algae that would be found at each depth:

1. 150-200m - Brown algae
   100-150m - Green algae
   0-50m - Red algae
2. 150-200m - Red algae
   100-150m - Brown algae
   0-50m - Green algae
3. 150-200m - Green algae
   100-150m - Red algae
   50-100m - Brown algae
4. 150-200m - Brown algae
   100-150m - Red algae
   50-100m - Green algae

Q. Match the types of algae in column A to their respective pigments in column B:
$\begin{array}{cc}ColumnA& ColumnB\\ p.Greenalgae& i.Chlorophyll\\ q.Redalgae& ii.Fucoxanthin\\ r.Brownalgae& iii.Phycobilin\end{array}$

1. p-i, q-ii, r-iii
2. p-iii, q-i, r-ii
3. p-i, q-iii, r-ii
4. p-ii, q-iii, r-i

Q. Regarding the assertion and reason, choose the correct option:
Assertion [A]: Of the three major types of algae that exist underwater, red algae are found at the deepest range.
Reason [R]: The accessory pigment of red algae phycobilin can absorb blue light.

1. Both A and R are correct but R does not explain A
2. Both A and R are correct and R explains A
3. A is incorrect but R is correct
4. Both A and R are incorrect

Q. Which colour of visible light spectrum penetrates deepest into the ocean?

1. Blue
2. Green
3. Violet
4. Red

Q.

Which of the following object is luminous?

1. Table

2. Moon

3. Earth

4. Sun

Q.

Which type of material allows light to pass through it completely?

1. None of these

2. Opaque

3. Transparent

4. Translucent

Q. Light is the ___ that can be detected by the human eye.

1. Electromagnetic radiation
2. Longitudinal wave
3. Both A and B
4. None of these

Q.

Which of the following best depicts how we see objects?

1. 

2. 

3. 

4. 

Q.

Which of the following object is NOT transparent?

1. Air

2. A thick colored glass window

3. Vacuum

4. Water