Answer: Option (c) is the correct answer.
Explanation:
Polar bear has two layers of fur and a thick layer of fat called blubber. These layers help a polar bear to maintain warmth in his body.
These layers keep the temperature of polar bear about .
Therefore, we can conclude that out of the given options, thick fur is the trait which enables a polar bear to survive in an extremely cold climate.
Answer:
1
Explanation:
Using the Rydberg formula as:
where,
λ is wavelength of photon
R = Rydberg's constant (1.097 × 10⁷ m⁻¹)
Z = atomic number of atom
n₁ is the initial final level and n₂ is the final energy level
For Hydrogen atom, Z= 1
n₂ = 2
Wavelength = 410.1 nm
Also,
1 nm = 10⁻⁹ m
So,
Wavelength = 410.1 × 10⁻⁹ m
Applying in the formula as:
Solving for n₁ , we get
n₁ ≅ 1